Homo habilis may have been the first hominid to:
a. bury its dead.
b. use pictorial symbolism.
c. use fire for cooking and heating.
d. have well-organized family units.
e. consciously designed tools
E
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Horizontal gene transfer between host organisms and their symbionts
A) happens frequently because of coevolution. B) causes genome reduction in the symbiont and genome expansion in the host. C) causes genome reduction in both the host and the symbiont. D) has been observed, but is considered a rare event.
When a ciliate reproduces asexually by mitosis:
A. The macronucleus divides into two with each new cell receiving an identical macronucleus. B. The macronucleus divides into four micronuclei with each new cell receiving two micronuclei each. C. The macronucleus doesn't divide but it goes to one new cell and the micronuclei go to the other. D. The macronuclei fuse with the micronuclei and then divide into two with each new cell receiving an identical fused nucleus. E. none of the other choices provided
Recognition sites of restriction enzymes are ________.
Fill in the blank(s) with the appropriate word(s).
Which postulate of natural selection is deliberately enforced by dog breeders using artificial selection?
a. Individuals in a population vary. b. Survival and reproduction are not determined by chance. c. Traits are passed from parent to offspring. d. Some individuals fail to survive and reproduce.