Which of the following is a pair of closely related homologous features?
a. bear paw and bat wing
b. bear paw and blue jay wing
c. snout of African golden mole and snout of North American mole
d. butterfly wing and blue jay wing
e. cactus spine and porcupine quill
Ans: a. bear paw and bat wing
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When the Darwin/Wallace theory of natural selection is summarized, four central postulates emerge. Which of the following is NOT one of these four natural selection postulates?
A) Variations exist in any given generation of a species. B) Variations in traits are produced by mutations. C) Variations are, at least in part, heritable. D) Those individuals whose variations confer an advantage are more likely to survive and reproduce.
All of the following types of chemical bonds are responsible for maintaining the tertiary structure of
this polypeptide except:a.
ionic bonds.
b. hydrogen bonds.
c. hydrophobic interactions.
d. disulfide bonds.
e. peptide bonds.
Substances such as alcohol that promote the formation of urine are known as ________
A) diuretics B) renal stimulators C) antidiuretics D) hormones
Mortality rate measures the number of people with infections. Morbidity rate measures the number of deaths in a population.
a. true b. false