Primarily due to habitat destruction, pollution, human disruption, fragmentation.
A. hotspot
B. habitat loss
C. edge effects
D. megafaunal extinction
E. extinction vortex
B. habitat loss
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Variation among individuals in a species is usually caused by:
A. environmental variation. B. genetic variation. C. infectious variation. D. both environmental variation and genetic variation. E. environmental variation, genetic variation, and infectious variation.
Because ____ is less likely to occur between distant populations of the same species, their gene pools and phenotypes
are often somewhat different.
a. genetic drift b. a population bottleneck c. a founder effect d. gene flow e. asexual reproduction
The single long process that extends from a typical
motor neuron is the a. axon. b. neuron. c. synapse. d. dendrite. e. cell body.
What is the total number of different possible combinations of bases in a codon?
A) 20 B) 3 C) 64 D) 4