What is the key defining characteristic of hominins?
a. language
b. the use of tools
c. opposable thumbs
d. bipedal locomotion
e. loss of supraorbital ridges
d
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Pedigree analysis is necessary when studying human inheritance patterns because _____
a. humans have more than 20,000 genes b. of ethical problems with experimenting on humans c. inheritance in humans is more complicated than in other organisms d. genetic disorders occur in humans e. all of these
The variable in the butterfly experiment is
a. butterfly wing pattern color. b. butterfly species. c. bird predator species. d. rainforest region used. e. percentage of survivors.
Halophiles
A. require a high salt environment. B. use bacteriorhodopsin to capture solar energy. C. may be chemoheterotrophs or photosynthetic. D. increase the chloride level within their cells. E. All of the choices are correct.
Which of the following is the most likely candidate for the first eukaryotic life-forms to move onto land?
A) algae in shallow water B) trilobites C) amphibians in shallow water D) fungi