(猎物),the two species are strongly linked; when a surprising amount of control over the size of populations of a predator lives on various species, they are weakly linked.other species—-including species they did not directly attack.And unplanned human activities have proved the ide a oftop...
Studies in the development of humans suggest that culture, whether taken as an effort against nature or a natural effort, is part of the development of the human species(物种). Several modern writers saw the process of education as a struggle(斗争) against human nature. We are born with ...
So molecules like this ended up on Earth. In fact, what we call meteorites are pieces broken away from comets and asteroids that came in our atmosphere and left their extra-terrestrial organic matter on the surface of primitive Earth.这样的分子最终来到了地球上。事实上，我们所说的陨石是来自彗星...
estimate human activity has severely affected the 答案分析 根据第二段最后一句“This new fish biodiversity in more than half of the world's index also measures the function of each rivers.(… …现在研究人员估计人类活动严重影 freshwater species and their evolutionary 响世界上超半数河流的鱼类多样性...
Genetically, the difference between humans and chimpanzees is less than 2%. Both species are so similar, yet so different in many ways. The differences are what we acquired or may be lost after the evolutionary split. What did we humans inherit from our ancestors and what have we lost?
A. Culture belongs to human nature.B.Nature teaches humans how to adapt.C. Humans are supposed to be well organizedD. Education pushes the human species to progress. 2. Why does the writer talk about hunting in Paragraph 3? A. To suggest some possible ways of changing living habitsB. ...
the cloned animals and owners should be stressed. So far, no authority has said whether cloned pets are absolutely safe and healthy. Besides, there are no explicit regulations or measures regarding cloned pets yet. Improving technology without regulations shows a disregard for human health and ...
72. We learn from the text that Wilson cares most about ___ A. the environment for plants B. the biodiversity of our earth C. the wastes of natural resources D. the importance of human values 73. How many species are most important to our present food supply? A. ...
2. Why did the findings draw a large amount of interest in the science world? A. Because jaws are a key trait of all vertebrate species. B. Because jaws are significant in animal evolution. C. Because the rise of the jaw had been a mystery. D. Because there is a lack of sufficient...
compare with pea-brained sea turtles, which were here long before us and survived the disaster that wiped out the dinosaurs. Still, it is comforting to realize that other species besides our own can stand back and assess the world...