Previously, many naturalists believed that African savanna elephants and African forest elephants were two populations of the same species, despite the elephants’ significant size differences. The savanna elephant has an average shoulder height of 3. 5 metres while the forest elephant has an average shoulder height of 2. 5 metres. The savanna elephant weighs between six and seven tons, roughly double the weight of the forest elephant. But the fact that they look so different does not necessarily mean they are different species. However the proof lay in the analysis of the DNA.
Alfred Roca, assistant professor in the Department of Animal Sciences at the University of Illinois, said, “We now have to treat the forest and savanna elephants as two different units for conservation purposes. Since 1950, all African elephants have been conserved as one species. Now that we know the forest and savanna elephants are two very distinctive animals, the forest elephant should become a bigger priority (优先) for conservation purposes.”
1. One of the fossils studied by the researchers is that of .
A. the Asian elephant B. the forest elephant
C. the savanna elephantD. the mastodon elephant
2. The underlined word “divergence” in Paragraph 4 means “ ."
AA. evolutionB. exhibition C. separationD. examination
3. The researchers’ conclusion was based on a study of the African elephant’s .
【2017届高考英语一轮复习阅读理解解析版汇编:73(含解析)】相关文章:
★ 贵州省贵阳市2014高考英语(新人教版)一轮阅读训练(15)附答案
★ 2014届高考英语一轮复习课时作业(三十)必修5Module 6《Animals in Danger》(外研版)
最新
2017-04-24
2017-04-24
2017-04-24
2017-04-24
2017-04-21
2017-04-21