Q. How much percentage of animals on this earth are regulators?
A) 2%
B) 3%
C) 4%
D) 1%
Explanation
About 99% of animals and nearly all plants do not have a mechanism to maintain a constant internal body environment. Their body temperature changes with the surrounding temperature (ectotherms)
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.