Another feature of many desert perennials is that after the rainy season they lose their leaves in preparation for the long, dry season, just as trees in wetter climates lose theirs in preparation for the winter. This reduces their water loss by evaporation during the dry season. Then, in next rainy season, they come fully alive once more, and grow new branches, leaves and flowers, just as the grasses and flowers in desert do.
EXERCISE:
1. Ordinary plants are unable to survive in the desert mainly because of the changeable weather.
A) True B) False C) Not mentioned
2. Grasses and flowers in desert are able to survive because they stay in the form of seeds to wait for the right amount of water to come.
A) True B) False C) Not mentioned
3. Grasses and flowers in the desert whose life cycles are short shows their ability to adapt to the quick disappearance of rainwater there after it falls in spring.
A) True B) False C) Not mentioned
4. Winter is the toughest season for grasses and flowers to survive.
A) True B) False C) Not mentioned
5. The shoot system of perennials can help the plants absorb less of the sun's ray.
A) True B) False C) Not mentioned
6. The theme of the second last paragraph is why the perennials can survive as plants for several years.
A) True B) False C) Not mentioned
7. Desert perennials lose their leaves after the rainy season just lose theirs in wetter climates before winter arrives, but the reasons for this feature are different.
A) True B) False C) Not mentioned

Key: BABCAAB

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