HORTICULTURE SCIENCE
ULTRA STRUCTURE OF PLANT CELLS AND ORGANS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The roots can take in more sunlight to grow rapidly.
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The roots can spread pollen.
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The roots can get more air.
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The roots can collect water quickly when it rains.
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Detailed explanation-1: -Cacti have shallow and wide fibrous roots close to the surface to quickly absorb rainwater. The desert is a dry place but it does experience rainfall occasionally. To collect rainwater from the ground, these plants have shallow roots that usually cover a large area.
Detailed explanation-2: -Cacti have thick, fleshy stems that store water, and sparse leaves that minimize evaporation. Some cacti, such as the saguaro, can store up to 1, 000 gallons of water in its trunk. Succulents have dense, broad leaves that store water, and often have a waxy coating that helps prevent evaporation.
Detailed explanation-3: -A cactus has long, fibrous roots which spread over a wide area and are shallow, so they can collect surface water immediately after any rainfall. Some cactuses send out taproots, which grow deep into the ground to reach water and help provide stability.
Detailed explanation-4: -Cacti have a thick, hard-walled, succulent stem – when it rains, water is stored in the stem. The stems are photosynthetic, green, and fleshy. The inside of the stem is either spongy or hollow (depending on the cactus). A thick, waxy coating keeps the water inside the cactus from evaporating.