About __________ of documented animal extinctions have been of invertebrates.
a. 50%
b. 10%
c. 20%
d. 80%
e. 90%
Answer: a. 50%
You might also like to view...
Which of the following lists the organization of a mammalian body from least to most complex?
A. tissue—cell—organ system—organ B. organ system—organ—tissue—cell C. cell—tissue—organ—organ system D. tissue—organ—cell—organ system E. organ—organ system—tissue—cell
A sequence of DNA could have ________ possible reading frame(s).
A) two B) three C) four D) an infinite number of
The smallest population that fits specifications of a conservation plan is a(n) ____
a. target population b. endangered population c. minimum viable population size d. an entire ecosystem e. threatened species
Which of the following is NOT a documented biological result of global warming?
a. Warm-adapted marine species are becoming more common and cold-adapted species less common. b. Plants display earlier flowering and growth. c. Alpine butterflies are shifting their distribution 6.1 meters higher in altitude per decade. d. Animals display earlier migration and breeding. e. Massive animal extinction.