D.does research on the bones of animals
解析 推断题。根据短文中的“Invertebrates are animals that don’t have backbones(like slugs),and zoology is the study of animals.”可知,invertebrates是无脊椎动物,zoology是动物学。由此可以判断John Zardus是一位研究无脊椎动物的科学家。
答案 C
3.Photosynthesis may be defined as the process of ________.
A.removing oxygen and increasing carbon dioxide
B.chloroplasts using chlorophyll to make sugar
C.digesting and excreting chloroplasts
D.absorbing water and sugar from the soil
解析 细节题。根据短文中的“These chloroplasts turn carbon dioxide and water into sugar using sunlight and a chemical called chlorophyll...”可知,光合作用就是利用叶绿素和阳光,将二氧化碳和水转化为糖的过程。
答案 B
4.According to the finding of Pierce and his colleagues, sea slugs, unlike other animals,________.
A.can store a lifetime supply of chlorophyll
B.never have the function of photosynthesis
C.often get eaten by plants like algae
D.can make their own chlorophyll
解析 细节题。根据短文中第四段中的“and can make chlorophyll themselves.In other words,they have started to behave like their food”和倒数第二段最后的“it can use photosynthesis to make food”可知,海蛞蝓与其他动物的区别是它们能自己制造叶绿素,并利用光合作用来为自己提供食物。
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