Organisms have a great variety of ways of adapting. They may adapt in their structure, function, and genetics; in their development and production of the young; and in other respects. An organism may create its won environment, as do warm-blooded mammals, which have the ability to adjust body heat exactly to maintain their ideal temperature despite changing weather. Usually adaptations are an advantage, but sometimes an organism is so well adapted to a particular environment that, if conditions change, it finds it difficult or impossible to readapt to the new conditions.
2. In the first paragraph, the word environments could best be replaced by
A. contexts
B. surroundings
C. neighbors
D. enemies
3. It can be inferred from this passage that the feathers of a bird care colored
A. to frightened its enemies.
B. to attract its enemies
C. to adjust its body heat
D. to match its environment
4. Which of the following is not directly mentioned?
A. A living thing may adapt in its structure.
B. An organism may adapt in its function.
C. A living creature may adapt in its genetic makeup.
D. A living organism may adapt in its sleeping habit.
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