根据材料请回答 41～45 题 Adaptation of Living ThingsCertain animals and plants develop c

根据材料请回答 41～45 题

Adaptation of Living Things

Certain animals and plants develop characteristics that help them cope with their envi-ronment better than others of their kind.This natural biological process is called adapta-tion.Among the superior characteristics developed through adaptation are those that may help in getting food or shelter, in providing protection, and in producing and protecting the young.That results in the evolution of more and more organisms(生物体)that are bet-ter fitted to their environments.

F．ach living thing is adapted to its way of life in a general way, but each is adapted es-pecially to its own distinct class.A plant, for example, depends upon its roots to fix itself firmly and to absorb water and inorganic cbemicals(无机物). It depends upon its green leaves for using the sun's energy to make food from inorganic chemicals.These are gener-al 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 are bidden by their body color or shape, and many look like a leaf or a little branch.The coats of deer are colored to mix with the 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 struc-ture.function, 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 roam mals(哺乳动物), which have the ability to adjust body heat exactly to maintain their ideal temperature despite changing weather. Usually adaptations are an advantage, but some times 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.

第 41 题 Some plants and animals develop superior characteristics so that they may

A．help others of their kind get food, shelter and other things needed

B．survive even in extremely severe conditions

C．become belier adapted to the environments than others of their kind

D． result in the evolution and production of more intelligent organisms