Which of these is an example of the action of an endocrine disruptor?
A) BPA in bottles affects particular glands.
B) Feedback from estrogen inhibits FSH.
C) Lack of iodine prevents synthesis of adequate thyroid hormone.
D) Lowered levels of calcitonin causes increased bone density.
A
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Homeotic genes are, in general, in control of _____
a. X chromosome inactivation b. formation of major body parts c. methylation of nucleotides d. dosage compensation e. sex determination
What might result from the overwatering of houseplants and garden plants?
A) an increase in chlorophyll within the leaves B) decreased rates of transpiration C) dormancy due to loss of leaves D) the formation of hydroids
The number of individuals that can be supported in a given habitat is the:
a. biotic potential. b. density-independent effect. c. carrying capacity (K).
Which one of the following virulence factors contributes most to the spread of disease in the body?
A) endotoxin production B) siderophore production C) hemolysin D) hyaluronidase