Which is a hominin?
a. chimpanzees only
b. australopiths only
c. baboons only
d. humans and australopiths
e. chimpanzee, australopiths, and baboons
d
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A nerve cell returns to the resting potential as ______ ions leave the cell
a. sodium b. potassium c. calcium d. chloride e. ammonium
How did Bateson and Punnett's work with comb morphology in chickens differ from the dihybrid work of Mendel?
A. They were working with sex-limited traits. B. Their F2 offspring displayed 4 unique phenotypes, not the four combinations of two phenotypes expected in a Mendelian cross. C. ½ of their combinations were lethal. D. The expression of their trait varied by the environment in which the chickens were raised.
The point at which the rate that a deleterious allele is being eliminated from a population by natural selection is in equilibrium with the rate at which the deleterious allele is being replaced by a new mutation is termed ________
A) mutation-dependent selection B) frequency-dependent selection C) mutation-dependent equilibrium D) mutation-selection balance
A symbiotic relationship where both of the co-existing species benefit from the interaction is called ________.
a) commensalism b) parasitism c) mutualism d) communism