alleryAbout what fraction of animals cannot maintain a constant internal environment?
A1 percent
B99 percent
C50 percent
D10 percent
Answer & Solution
Correct answer: B. 99 percent
1. Only birds, mammals and a few others regulate.
2. Nearly all the rest conform.
3. That is about 99 percent of animals.
_Source: syllabus Biology, Chapter 13, Organisms and Populations._
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