As human mortality is greatest during later life stages (and most children survive into adulthood), humans demonstrate a __________ survivorship curve
A. Type I
B. Type II
C. Type III
A
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Which trait is characteristic of a K-selected species?
a. adapted to rapidly changing environments b. small body size c. short generation time d. provide substantial parental care to offspring e. single reproductive event
Most of the tallgrass prairies have been converted
a. to grazing lands. b. for citrus production. c. to homesteads. d. to cereal croplands. e. to vineyards.
Albinism is an autosomal (not sex-linked) recessive trait. A man and woman are both of normal pigmentation and have one child out of three who is albino (without melanin pigmentation). What are the genotypes of the albino's parents?
A) One parent must be homozygous for the recessive allele; the other parent can be homozygous dominant, homozygous recessive, or heterozygous. B) One parent must be heterozygous; the other parent can be homozygous dominant, homozygous recessive, or heterozygous. C) Both parents must be heterozygous. D) One parent must be homozygous dominant; the other parent must be heterozygous.
An enzyme that works in the stomach may not work in the small intestine because
A. the pH of the stomach contents is different than that found in the intestine. B. the temperature is so different that the enzyme will be inhibited from taking action. C. enzymatic competition will result in the denaturation of the substrate. D. there will not be enough collisions to result in enzyme-substrate formation.