Write anatomical adaptations in aquatic plants

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Write anatomical adaptions in aquatic plants

Write anatomical adaptations in aquatic plants

Certain aquatic fly and beetle larvae have a novel adaptation which allows them to take unusual advantage of this. A sharp appendage on the end of their abdomen is used to pierce into submerged plants, giving them access to the internal air-filled cavities as their own personal oxygen source. Offwell Wetland Open Water Species Lis Adaptations in hydrophyte are of three kinds, ecological, physiological and anatomical. To survive in the aquatic habitat, hydrophytes modify their structures like leaves, stem, roots and the physiology of the cells to adapt themselves according to the different aquatic habitats like freshwater, marine water, lakes, ponds Adaptation in Aquatic Plants Plants which live in water ecosystem like lakes, rivers, ponds, bogs etc. face many problems. The most common are low oxygen content, low light intensity, lack of soil, and nutrients. Aquatic plants have their roots underwater, but the upper half partially emerges from the water to enable photosynthesi

Some aquatic plants, however, show a lacuna in the centre in the place of xylem. Such spaces resemble typical air chambers (Fig. 8.8). Phloem tissue is also poorly defined in most of the aquatic plants but in some cases it may develop fairly well. Sieve tubes of aquatic plants are smaller than those of mesophytes Adaptation is an evolutionary process whereby an organism becomes increasingly well suited to living in a particular habitat. It is not a quick process! Natural selection over many generations results in helpful traits becoming more common in a population. This occurs because individuals with these traits are better adapted to the environment and therefore more likely to survive and breed Anatomical Adaptations of Xerophytes. 1. Root hairs and root caps are well developed in Opuntia. 2. Roots may become fleshy to store water as in Asparagus. 3. In succulent xerophytes, stems possess a water storage region (thin walled parenchyma cells) 4. Stems of non-succulent xerophytes show a very thick cuticle, well developed epidermis with. Give two examples of each leaf and stem adaptations of plants that are grown in: A. Xeric conditions B. Mesic conditions C. Aquatic conditions Describe at least six morphological and anatomical. Hydrophytes: Classification and Adaptations (Morphological, Anatomical and Physiological Adaptations of Aquatic Plants) What is an adaptation? Ø Any feature of an organism which enables it to exist under conditions of its habitat is called adaptation. Ø Adaptations are for withstanding adverse conditions of environment and to utilize the maximum benefit of the environment (nutrition or.

Adaptations help the organisms to exist under the prevailing ecological habitat. Based on the habitats and the corresponding adaptations of plants, they are classified as hydrophytes, xerophytes, mesophytes, epiphytes and halophytes. Hydrophytes. The plants which are living in water or wet places are called hydrophytes Write a short note on (a) Adaptations of desert plants and animals (b) Adaptations of plants to water scarcity (c) Behavioural adaptations in animals (d) Importance of light to plants (e) Effect of temperature or water scarcity and the adaptations of animals The leaves are pointed, 1/4-inch long and bright green. It remains rooted in the bottom of both shallow and deep waterways, where few plants grow. The long stems reach toward the light at the surface of the water. Once it nears the surface, it grows horizontally, forming thick, impenetrable mats. Hydrilla grows as much as 1 inch a day Plant groups based on adaptations, Types of adaptations: Morphological adaptations of plants, Anatomical adaptations of plants and Physiological adaptations of plants. Adaptations of Hydrophytes: Morphological adaptations of hydrophytes, Anatomical adaptations of hydrophytes, Physiological adaptations of hydrophyte Record their responses using the Plant Adaptations Worksheet (see S-4-2-3_Plant Adaptations Worksheet in the Resources folder) as either a transparency or by projecting it on an interactive whiteboard. This serves as a pre-assessment to see what students already know about plant adaptations

Adaptations of plants for desert habitats: 1. Many desert plants have a thick cuticle on their leaf surfaces and have their stomata in deep pits to minimize loss of water through transpiration. 2. They show a special photosynthetic pathway (CAM - Crassulacean Acid Metabolism) that enables their stomata to remain closed during the daytime. 3 The plants are adapted to diurnal,seasonal or annual fluctuations of the habitatconditions. For land plants the main limiting factor is the availability of soil water whereas, for aquatic plants the main limiting factors are the fluctuations in water level, availability of gases like CO2 and O2 and the light intensity Halophytes: Classification and Characters of Halophytes (With Diagram) Some plants grow and complete their life cycle in the habitats with a high salt content. They are known as salt plants or halophytes. According to Stocker (1933), the critical level of salinity for plants is 0.5% of the dry weight

Morphological Adaptations of Aquatic Animals and Plant

Section 1 Objectives o C h il d renwu st am p o . o C h il d re nwb a tox py ms . o C hil d r en wb a tox pf y sm v different animals. Animal Adaptations -- Vocabulary Adaptation A body part, body covering, or behavior that helps an animal survive in its environment Start studying Anatomical Adaptations. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Home Subjects. A segment of a plant stem between the points where leaves are attached. nonliving vascular tissue that carries water and dissolved minerals from the roots of a plant to its leaves Agnes Arber (1879-1960) was a prominent British botanist specialising in plant morphology and comparative anatomy. In 1946, she became the first female botanist to be elected a Fellow of the Royal Society. First published in 1920, this volume provides a detailed anatomical study of aquatic flowering plants, with a discussion of their evolutionary history have anatomical adaptations that concentrate chloroplasts in cells into which 4-carbon carbon dioxide carriers are actively transported. This increases the flow of carbon dioxide into the leaf, allowing C4 plants to have smaller stomata openings. This, in turn, decreases water loss

Morphological and Anatomical adaptations of Hydrophyte

  1. Have students write a list of the following environments in their notes: wetland, tundra, desert, prairie, ocean, and forest. Use a projector to show them the Animal Adaptations PowerPoint presentation. Each time they see an animal that is adapted to one of these environments, have them write the animal's name next to that environment
  2. Physiological dryness: In these habitats, water is sufficiently present but plants are unable to absorb it because of the absence of capillary spaces. Example: Plants in salty and acidic soil. Question 51. Point out the Anatomical adaptations exhibited by the Halophytes. Answer: Anatomical adaptations
  3. Types of Adaptation. 1. Physical Adaptation. Physical adaptations are special body parts, such as shapes, skin, and color, that help the organisms to survive in their natural habitat. Examples of physical adaptations - the thickness of an animal's fur helps them to survive in cold environments. The shape of a bird's beak helps them to eat.
  4. Cacti have numerous anatomical and behavioral adaptations for absorbing and storing water, preventing water loss, protecting themselves from predators, limiting damage from the hot sun, saving their energy, requiring few resources, and attracting pollinators. Read on to learn how every part of the cactus plant has become optimized for desert.
  5. Totally submerged plants are the true water plants or hydrophytes. Because they are truly aquatic they have the greatest number of adaptations to life in water. These include: The presence of little or no mechanical strengthening tissue in stems and leaf petioles. If these plants are removed from the water, they hang limply

Adaptations of totally submerged, floating and swamp plants

Adaptations to environment in plants - definition. Plants which remain permanently immersed in water is called hydrophytes. Xerophytes occurs in the regions where the amount of water in the soil is very scarce. Mesophytes are plants that grow in areas where water is neither in excess nor deficient such as cultivated lands The amounts of water and ions reabsorbed into the circulatory system are carefully regulated and this is an important way the body regulates its water content and ion levels. The waste is collected in larger tubules and then leaves the kidney in the ureter, which leads to the bladder where urine, the combination of waste materials and water, is. Frog adaptations include specialized legs, feet, skin, eyes and body shape. Frogs primarily live in water, so many of their adaptations enhance their ability to live effectively in an aquatic environment. Frogs have long and powerful legs that allow them to jump and swim for long distances. They also have webbed feet that act as fins to aid in. Wetland plants are also called hydrophytic plants, because they live in water. Hydrophytic plants have developed special adaptations that enables them to survive the conditions of environmental stress experienced by living in the wetlands. Stressful environmental conditions brought on by living in wetlands include: 1. fluctuations in water.

Adaptations in Hydrophytes - Meaning and Types - Biology

Aquatic adaptation. Aquatic adaptations are found in those plants and animals that live in water habitats: fresh water, brackish water, and sea water. For example, fresh water organisms develop features to prevent the entry of excess water or processes to drain excess water regularly What adaptations will help an animal survive in a new environment? Working in a group, write a list of your favorite animals on small slips of paper. Place them in a cup or hat. Then write a list of environments, such as tundra, rain forest, and desert, on slips of paper and place them in another cup or hat. Make sure yo

Adaptation - Meaning, Plant & Animal Adaptation

PARASITIC ADAPTATIONS The survival of a parasite in the body of the host depends upon its abiity to adapt to the surrounding environment at the site of its infection,this is called microenvironment. To adapt to this microenvironment, certain morphological, anatomical and physiological changes occur and because of which the parasite survives in the host The first step of the Calvin cycle is the fixation of carbon dioxide by rubisco, and plants that use only this standard mechanism of carbon fixation are called plants, for the three-carbon compound (3-PGA) the reaction produces. About of the plant species on the planet are plants, including rice, wheat, soybeans and all trees Ecological Adaptations in Xerophytes. Xerophytes are group of plants that survive in dry regions. They grow in deserts, dry hilly regions. They adapt themselves to dry and sandy or rocky soils having poor water content and extreme atmospheric conditions. Xerophytes can withstand drought, intense light, extreme temperature and strong wind

Plant Adaptations: Introduction and Ecological

  1. First published in 1920, this volume provides a detailed anatomical study of aquatic flowering plants, with a discussion of their evolutionary history. Arber describes the general anatomical and reproductive organs, life histories and physiological adaptations of aquatic plants in detail, with interpretations informed from her previous.
  2. Angiosperm Adaptations. Angiosperms (flowering plants) are the largest Phylum in the plant kingdom Plantae. These plants have true roots, stems, leaves, and flowers. The roots grow into the soil to anchor the plant in place and take up water and nutrients. The leaves are above ground and act as the main organs for photosynthesis
  3. The word adaptation does not stem from its current usage in evolutionary biology but rather dates back to the early 17th century, when it indicated a relation between design and function or how something fits into something else. In biology this general idea has been coopted so that adaptation has three meanings. First, in a physiological sense, an animal or plant can adapt by adjusting to its.

Dung moisture measurements obtained through water deprivation experiments are thus a better indicator of their water requirements, as the dung moisture of wild ungulates is affected by the local availability of water. In contrast, anatomical adaptations such as the dimensions of the kidney and intestine, and consequently dung size, are likely. Bryophytes are a critical link between aquatic and land plants and they contain a number of adaptations that are characteristic of both land and aquatic plants. As mentioned above they have cuticles, gametangia and embryonic development which are all features of more advanced, land plants Xerophytes have adapted numerous anatomical and physiological features to survive in desert conditions. Some conditions that desert plants need to ameliorate are water loss and storage, along with better water absorption methods. Desert plants overcome water loss with various specialized features such as altering stomata characteristics Plant Adaptations to Water. Some plants live directly in the water, while others live in soil that is very close to the water's edge. Whether a plant is purely aquatic (water dwelling) or if it grows in boggy or muddy conditions, its survival depends on appropriate adaptations

Other articles where Mesophyte is discussed: angiosperm: Leaves: Mesomorphic leaves are adapted to conditions of abundant water and relatively humid conditions; xeromorphic leaves are adapted to dry conditions with relatively low humidity; and hydromorphic leaves are adapted to aquatic situations, either submerged or in standing water. Mesomorphic leaves (the most common type) ar A plant's root is the most relevant organ for the plant adaptation to stress conditions, playing pivotal roles in anchorage and the acquisition of soil-based resources. Thus, dissecting root system variations and trait selection for enhancing yield and sustainability under drought stress conditions should aid in future global food security The plant body can be divided into true root, stem, and leaves. A saprophyte is the main plant body here. Some of the species belonging to this division have small leaves called the microphylls. For example, Selaginella. Megaphylls are the large leaves that some pteridophytes have. For example, fern plants. The main plant bears the sporangia 1. This include plants that live in water or wet conditions. 2. Leaves are large and broad. 3. These plants lack thick cuticle layer. 4. Stomata are present on the upper surface of leaf and are large in number. Example: Water hyacinth. Xerophytes: 1. This includes that live in dry conditions or Desert areas. 2. Leaves are small and spiny. 3

Plants, Animals, and Ecosystems. Most plants and animals live in areas with very specific climate conditions, such as temperature and rainfall patterns, that enable them to thrive. Any change in the climate of an area can affect the plants and animals living there, as well as the makeup of the entire ecosystem Lastly the location of the pores on a leaf is an adaptation that enables plants to reduce water loss from their leaves. The pores are located on the underside of leaves so they are not directly exposed to the sun. If they were on the top, then the sun would directly hit the leaves. This would result in too much water loss for the plant

Hydrilla (waterthyme) is a genus of aquatic plant, usually treated as containing just one species, Hydrilla verticillata, though some botanists divide it into several species.It is native to the cool and warm waters of the Old World in Asia, Africa and Australia, with a sparse, scattered distribution; in Australia from Northern Territory, Queensland, and New South Wales Cacti are succulent plants.Succulence is the ability of tissues to accumulate water. As the rains in the places where cacti usually grow are very sporadic, these plants find it necessary to store a large amount of liquid in their stems, which they can resort to in dry periods.. Succulence or thickening is an adaptation phenomenon that occurs in ecosystems where rainfall is very scarce, very. The Plant Science option includes the study of cells, genetics, anatomy, physiology, taxonomy, and ecology of terrestrial and aquatic vascular plants, mosses, algae and fungi. The option emphasizes plant structure and function, diversity, evolutionary and anatomical adaptations and interactions between plants and their environment 10 The Okapi's Bizarre Tongue. Long Tongue of Okapi. The Okapi, native to remote African forests, resembles a horse with zebra stripes, but this elusive animal is actually a close relative of the giraffe. It's usually found at elevations greater than 500 meters (1,640 ft), where its oily fur helps it stay dry in the constant drizzle Adaptations may help a plant or animal survive the cold, the heat, find food, use tools, hide from predators, and much more. Sometimes adaptations seem strange, but they are essential to surviving any environment, including the ruthless arctic. Many different plants and animals can have the same adaptation for surviving the same phenomena

Marine organisms and adaptations — Science Learning Hu

  1. Plant Adaptations Desert plants are adapted to their arid environment in many diff erent ways. Stomata are the holes in plant leaves through which they transpire water. Many desert plants have very small stomata and fewer stomata than those of other plants. The stomata of many cacti lie deep in the plants' tissues. This adaptation helps cact
  2. Wetland Plant Adaptations. Figure 1. Saltmarsh cordgrass. Wetland plants live a tough life. They are often under water for significant periods of time, meaning that they are frequently deprived of oxygen. Wetland plants also need to remain stable in the soil if they deal with fast moving water that ebbs and flows
  3. Salt Tolerance Adaptations. Adaptions for salt exclusion or salt excretion allows mangroves to live where other terrestrial plants cannot. Through physiological adaptations, mangroves are able to live in harsh saline environments. Red mangroves occur where soil salinities range from 60-65 parts per thousand (ppt) while black and white mangroves.
  4. Table 1.2 Water stress and salt stress effects on plants Table 1.3 Techniques to screen for salt tolerance in controlled environments for differing salt concentrations Table 1.4 Modified standard evaluation system of visual salt injury Table 3.1 Visual scoring of rice plants under differing salinity and aeration treatment

Bladderwort: This flowering plant grows below the water and is greatly reduced. It is often mistaken for green algae. Its leaves entrap small animals such as Daphnia and even larval fish. Pitcher Plants: These are adapted for life in marshy/boggy nitrogen poor soil. The leaves are passive but lethal to insects How Plants Have Adapted to Prevent Water Loss. Where water is plentiful and temperatures are moderate, plants have wide, thin leaves with lots of surface area for maximum photosynthesis. Plants. Globoid leaf galls with an abaxial concavity are induced by an undescribed species of Meunieriella Kieffer, 1909 (Cecidomyiidae) in Avicennia schaueriana Stapf & Leechm. ex Moldenke (Acanthaceae), a plant extremely adapted to mangroves. The gall-inducers may potentiate anatomical adaptations of host plants for producing a better shelter and food

Early plants shared aquatic habit however, now we can see plants in the modern world are living in different habitats. It is due to adaptation that facilitates plants to withstand, live and reproduce under particular environmental conditions. Plant adaptation makes the plant more specific to one area Anatomical Adaptations to Waterlogging The chief anatomical adaptation to waterlogging shown by plants is the formation of aerenchyma - tissue containing gas spaces. It is formed in the roots of wetland species like rice ( Oryza sativa ), and in some dryland species in adverse conditions Aquatic plants require particular adaptations to grow on the water's surface and cannot survive in terrestrial environments. For example, their stems are spongy with air spaces to keep the plant vertical or floating above the water. Aquatic plants have developed in different plant families and can be angiosperms or ferns

Anatomic Atlas of Aquatic and Wetland Plant Stems includes a hydrobotanical and an anatomical section. The hydrobotanical section describes the ecological classification of aquatic and wetland plants and explains major ecophysiological processes e.g., photosynthesis, mineral nutrition, gas exchange, adaptations to soil anoxia, turion formation. Nematodes are a highly diverse group of organisms that show a variety of adaptations to extremes in soil and plant environments. Developmental dormancy and diapause are important for seasonal survival and long-term longevity of eggs in some species, whereas changing sex ratios may improve survival chances of the next generation in some instances. More direct and immediate responses to. Plant adaptation arises from their morphology, itself a product of evolution and development. In this figure, the aspects and interactions of research at different levels are shown, with the work having implications across botany, including understanding plant phylogeny and speciation, and for ecology and ecosystems. Fig. 1

It is an aquatic habitat in a salt-water environment. There are plenty of aquatic plants and other organisms of all trophic levels. This habitat is dry and has hot temperatures. There is no nighttime in this environment, so it is light all of the time. There are few water sources close by, and there is also very little vegetation. Material Marine Biology News. Read scientific research on marine animals and their aquatic habitats. From plankton to whales, you will find it all here Water stress is one of the most important physiological stress factors that adversely affect soybeans in many critical aspects of their growth and metabolism. Soybean's growth, development and productivity are severely diminished, when soil or cell water potential becomes inadequate to sustain metabolic functioning. However, little has been done to gather comprehensive information regarding.

Video: Morphological, Anatomical and Physiological Adaptations of

B2e: Adaptations. Our environment is constantly changing. This affects animal and plant distributions. This item develops ideas about how some plants and animals successfully adapt to suit their changing environment. 5.0 / 5. Hide Show resource information. Biology. Adaptations of organisms to their environment. GCSE From water to land. In 1938, a South African fisherman pulled a strange catch from the waters of the Indian Ocean. The iridescent blue animal had oddly fleshy fins that looked something like limbs. Scientists had seen fish like it before — but only preserved as fossils in ancient rocks. The fish was a coelacanth (SEE-luh-kanth), a member of.

Plant Adaptations: Hydrophytes, Mesophytes & Xerophytes

Ecological Adaptations of Hydrophytes (PPT) Easy Biology

Examples of C4 plants include corn, sorghum, sugarcane, millet, and switchgrass. However, the C4 anatomical and biochemical adaptations require additional plant energy and resources than C3 photosynthesis, and so in cooler environments, C3 plants are typically more photosynthetically efficient and productive Plant and animal adaptations Plant adaptations. The following adaptations allow plants to survive in the conditions of the rainforest. Lianas - these are woody vines that have roots in the ground.

8. Structure of the Water-Conducting Systems in Plants: Xylem and Phloem Sap 9. Water Transport Inside the Plant 10. Stomatal Regulation of Water Evaporation 11. Adaptation to Drought 12. Transport of Water and Organic Compounds in the Phloem Glossary Bibliography Biographical Sketch Summary Water is an essential element for all living things Due to climate change, water level fluctuations (WLFs) in shallow lakes are expected to increase in the future. Such fluctuations significantly affect the growth and reproduction of submerged macrophytes, but the role of WLF on plant physiological mechanisms is far from clear. Our aims are to examine the effects of WLF on the submerged macrophyte Vallisneria spinulosa by testing changes in (1. I write a lot about animals for Neatorama and that's because I'm always reading about them. The coolest thing about the vast variety of critters is that there are so many and each has evolved their own strange adaptations to survive in their own niche of the planet. With each animal trying to carve out its own special place in the world, it's not too surprising that there are some. Heterophylly, or phenotypic plasticity in leaf form, is a remarkable feature of amphibious plants. When the shoots of these plants grow underwater, they often develop surprisingly different leaves from those that emerge in air. Among aquatic plants, it is typical for two or more distinct leaf development processes to be observed in the same individual exposed to different environments

Amphibian Adaptations. For amphibians, limbs and lungs were two of the most important adaptations as the former helped them move around without having to depend on the buoyancy of water, and latter replaced the gills to facilitate respiration. As time elapsed, amphibian species on the planet also evolved and came up with several new adaptations. Marine mammal adaptation to an aquatic lifestyle varies considerably between species. Both cetaceans and sirenians are fully aquatic and therefore are obligate water dwellers. Seals and sea-lions are semiaquatic; they spend the majority of their time in the water but need to return to land for important activities such as mating , breeding and. The adaptation of animals and plants to their environment is a series of varied biological processes with varying purposes, but the general purpose is the continued survival of the species. This is key to the difference between an animal's adaptation and ability. Many animals are able to engage in certain behaviors which have no discernible function and may not be a part of adaptation 2.2. Drought tolerant plants and their adaptations 6 2.3. Plant adaptations in plants against drought stress 7 2.4. Morphological adaptations in plants against drought stress. 8 2.5 Anatomical adaptations in plants against drought stress. 9 2.6 Physiological adaptations of plants against drought stress. 9 2.6.1. Water relations and drought 1 hang on tight @maddymadepottery Shrinking. Particular cacti have specific features on their stems. For instance, the ribs and flutes on a species, like the rounded ball cactus stem, enable it to easily shrink during the prolonged desert droughts and expand when it rains.. Shrinking is an adaptation that ensures there is just a small surface area hence reducing water loss

Ecological Adaptations Hydrophytes Xerophytes

In evolutionary theory, adaptation is the biological mechanism by which organisms adjust to new environments or to changes in their current environment. Although scientists discussed adaptation prior to the 1800s, it was not until then that Charles Darwin and Alfred Russel Wallace developed the theory of natural selection.. Wallace believed that the evolution of organisms was connected in some. 3) Writing/drawing materials BACKGROUND Many animals, including mammals, birds, reptiles, fish, insects and other invertebrates, have adapted to the stresses of the Sonoran Desert. Desert adaptations can be manifested in behavior, size, shape, or physiology. The highest priorities for any desert dweller are to survive the heat and lack of water. List the experimental variables in the experiment 4. a)Which variable resulted in the greatest rate of water loss? b) Explain why this factor might increase water loss when compared to the others 5. List 2 anatomical/morphological (structural) adaptations that would enable plants to decrease water loss 1 INTRODUCTION. Stomata control the exchange of gases between leaves and the atmosphere, and influence plant adaptation to climate as well as the global carbon and water cycles (Hetherington & Woodward, 2003).Across species and communities, stomatal density (d, pores per mm 2) and stomatal length (SL, μm) vary with latitude (Wang et al., 2015).. Plant Physiology - Fall 2017 Professor: Dr. Sasha Wright Lectures: Tues/Thurs 8am-8:50am in BIOS 245 (WILL BE IN ASCL 231 after first week) Labs: Tues/Thurs 9am-11:30am in ASCL 231 Contact information: awrigh20@calstatela.edu Office Hours: LKH 315, TUES 1-2pm, drop meetings are okay when my door is open, and you can email me ANY TIME to schedule a meeting outside of office hours

Write a short note on (a) Adaptations of desert plants and

Adaptation of the Hydrilla Plant eHo

On the hand, there are various aquatic-adaptations in aquatic animals; on the other hand, there are various adaptive-features to conserve water in the animals living in dry and desert places. For such particular mode of life; animals have developed morphological, anatomical and physiological adaptations Therefore, maintaining low intracellular sodium levels is critical for plant adaptation to water and salinity stress. Plants use different strategies to fight against salinity damage in every organizational level, from cellular, biochemical, molecular to anatomic, morphological and phenological level in shaping the anatomical, physiological, and ecological diversity of vascular plants. Lectures will provide an overview of plant-environment interactions, focusing on anatomical and physiological adaptations of leaves, stems, and roots to different habitats. A comparative, phylogenetic approach will be emphasized An adaptation can also be behavioral, affecting the way an organism responds to its environment. An example of a structural adaptation is the way some plants have adapted to life in dry, hot deserts. Plants called succulents have adapted to this climate by storing water in their short, thick stems and leaves Anatomy and Adaptations: Cacti have many adaptations that allow them to live in dry areas; these adaptations let the plant collect water efficiently, store it for long periods of time, and conserve it (minimizing water loss from evaporation).. Cacti have a thick, hard-walled, succulent stem - when it rains, water is stored in the stem. The stems are photosynthetic, green, and fleshy