更多"The story that traces life from sea"的相关试题:
[单项选择]The story that traces life from sea to land then into the multiple niches that exist there for a great variety of living things is a fascinating one, but far too detailed for our purposes. One key point for us in that story is the emergence of the biological class of animals that are called mammals.
Mammals have a number of features that distinguish them from the reptiles from which they developed. They are warm blooded; that is, they have a system of temperature control that keeps the body at a constant temperature. Mammals have a set of teeth of different shapes that serve different functions such as cutting, gouging, and grinding. Young mammals spend their earliest days of development shielded within the mother’s body and are then born alive, rather than hatching from eggs. In addition, after birth they are nourished by milk provided by the mother’s mammary glands. The enforced association between mother and infant provides an opportunity for learning that does not exist for
A. Features of Mammals
B. The Story of Evolution
C. From Mammals to Humans
D. Primate Behaviors
[单项选择]Life on land probably began about 430 million years ago, though it has existed in the water for perhaps as long as 3, 000 mil lion years. When we think of the first life on land, we probably think of strange animals coming out of the oceans, but, in fact, no animals could have been living if plants had not been on land first. Plants had to be on land before animals arrived. They supplied the first land animals with food necessary to live, since they are the only form of life that is able to get and store energy.
The first plants to exist out of the water were probably certain kinds of algae(海藻) which were followed by other plants that grew close to the ground near water and needed water in which to repro duce. Once the move to land had been made, however, evolution (进化) took place quickly. By the end of 100 million years, plants had developed their roots, and some developed tall tree like forms, since height was very important in competing for sunlight. About 300 million ye
A. life on land probably began about 4, 300 years ago
B. the first animal on land came from oceans
C. there wouldn’t be animals without plants
D. plants are the only form of life that is able to get and store energy
[填空题]Life on land probably (11) about 430 million years ago，though it has existed in the water for perhaps (12) 3,000 million years．When we think of the first life on land，we probably think of some (13) animals coming out of the oceans，but (14) ，no animals could have been living if plants had not been on land first．Plants had to be on land before animals arrived．They (15) the first land animals with food necessary to live．since they the plants are the only form of life that is able to get and store energy．
