Each living things is adapted to its way of life in a general way, but each is adapted especially to its owndistinct class. A plant,for example,depends upon its roots to fix itself firmly and to absorb water andinorganic chemicals. These ate general adaptations, common to most plants. In addition, there are special adaptations that only certain kinds of plants have.
Many animals have adaptations that help them escape from their enemies. Some insects are hidden by body color or shape,and many look like a leaf or a little branch. The coasts of deer are colored to mix with surroundings. Many animals have the ability to remain completely still when an enemy is near.
Organisms have a great variety of ways of adapting. They may adapt in their structure, functions, and genetics;in their development and production of the young;and in other respects. An organism may create its own 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 is difficult or impossible to readapt to new conditions.
36. Some plants and animals develop superior characteristics so they may_________.
A.help other of their kind get food,shelter and other things needed
【2014职称英语卫生B级练习:阅读指导】相关文章:
最新
2016-03-01
2016-03-01
2016-03-01
2016-03-01
2016-03-01
2016-03-01