Kin selection refers to
A) the selection of a mate.
B) deciding which related animals can live in the colony.
C) deciding which related animals can share the food.
D) determining which related animals must live and which must die.
E) an animal promoting the survival of the genes of its close relatives.
E
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The replacement model of human evolution asserts that ________
a. Homo sapiens evolved directly from Homo floresiensis b. Homo sapiens arose from a single Homo erectus population in Africa c. races of modern humans had their beginnings in Homo erectus d. populations of Homo erectus in Africa evolved into Homo sapiens gradually
Altruism in animals
a. lowers their chances of perpetuating their own genes. b. has no genetic basis. c. is a conscious effort to preserve the species. d. is just lucky behavior. e. includes none of these.
Why are Gram-negative bacteria more resistant than Gram-positive bacteria to damage by certain chemical agents like lysozyme?
A) Gram-negative bacteria contain peptidoglycan in their cell wall. B) Gram-negative bacteria have a thicker layer of peptidoglycan in their cell wall. C) Gram-negative bacteria lack a cell wall. D) Gram-negative bacteria have an outer membrane as part of their cell wall. E) Gram-negative bacteria have porins.
During sexual reproduction, novel mixtures of alleles are generated. This is because ______
(a) in all diploid species, two alleles exist for every gene. (b) a diploid individual has two different alleles for every gene. (c) every gamete produced by a diploid individual has several different alleles of a single gene. (d) during meiosis, the segregation of homologs is random such that different gametes end up with different alleles of each gene.