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E. Answer the following questions.
1. What do you understand by adaptations in plants?
2. What are the conditions that make plants different from each other?
3. How are terrestrial plants different from aquatic plants?
4. How do (a) banyan and (b) hydrilla plants adapt themselves to their habitats?
5. How are free-floating plants different from fixed-floating plants?
6. What are the adaptations in a cactus plant?
7. What are submerged plants?
Answers
Answer:
Adaptations are special features that allow a plant or animal to live in a particular place or habitat. ... These adaptations might make it very difficult for the plant to survive in a different place. This explains why certain plants are found in one area, but not in another.
The plants vary in many ways. The plants vary by the number of leaves they might have in a group, shape of the leaves, what color the flowers are or when the flowers might bloom. Botanists use these differences or characteristics to help identify the plants.
Terrestrial plants get plenty of air so they usually have stomata on the bottoms of their leaves. Aquatic plants have their leaves near or under the water, but they also need to breathe. Plants that float on the surface of the water have their stomata on top, where they have access to air.
Floating plants are the aquatic plants that float on water. They are light in weight as they have hollow spaces filled with air. ... Fixed plants are fixed in water and cannot move.
The outer layer of the stem usually has a tough cuticle, reinforced with waxy layers, which reduce water loss. These layers are responsible for the grayish or bluish tinge to the stem color of many cacti. The stems of most cacti have adaptations to allow them to conduct photosynthesis in the absence of leaves.
Submerged plants are rooted plants with flaccid or limp stems and most of their vegetative mass is below the water surface, although small portions may stick above the water.