The metabolic rate of an endotherm _____ at low environmental temperatures while the metabolic rate
of an ectotherm _____ at low environmental temperatures
a. falls; rises
b. falls; falls
c. rises; falls
d. rises; rises
e. it depends on the particular endotherm or ectotherm, so all of these are possible
C
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Prolactin
a. stimulates the mammary glands to produce milk. b. affects only animals with mammary glands. c. causes the development of breasts and other secondary sexual characteristics in the male. d. acts in concert with FSH to produce milk. e. has secondary effects on reducing the size of the uterus after birth
A certain type of congenital deafness in humans is caused by a rare autosomal (not X-linked) dominant gene
(a) In a mating involving a deaf man and a deaf woman (both heterozygous), would you expect all the children to be deaf? Explain your answer. (b) In a mating involving a deaf man and a deaf woman (both heterozygous), could all the children have normal hearing? Explain your answer. (c) Another form of deafness is caused by a rare autosomal recessive gene. In a mating involving a deaf man and a deaf woman, could some of the children have normal hearing? Explain your answer.
Identify four external features of a woody twig and briefly explain the function and/or origin of each. What will be an ideal response?
____ are not members of the basic food groups.
A. Meat and beans B. Dairy products C. Vitamins and minerals D. Fruits