As a result of receptor up-regulation:a
the number of genes that code for a receptor increases.
b. the sensitivity of a cell to a hormone decreases.
c. the number of receptors decreases.
d. the concentration of hormone molecules in the blood increases.
e. a hormone's signal is amplified
E
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While doing a pedigree analysis of a European royal family, you notice a disease in a female child of two healthy parents. There are also some cousins with the same genetic disease
If this disease is controlled by a single gene, then the most likely explanation for these observations would be: A. the disease is a spontaneous mutation. B. the disease is recessive and only seen in homozygous recessive individuals such as the daughter. C. the disease is dominant and only seen in homozygous dominant individuals such as the daughter. D. the disease is only seen in heterozygous individuals such as the daughter. E. the disease is dominant and is seen in homozygous dominant or heterozygous individuals.
If increased CO2 concentrations result in plant tissue that is less nutritious, which of these is not a potential consequence for insect herbivores?
A. They must eat more tissue. B. Their development may be slowed. C. They grow fatter because their diet has more carbohydrates. D. They use up more energy trying to eat for food. E. Their reproductive cycles may be disrupted because their rate of growth changes.
If a child belongs to blood type O, he or she
could NOT have been produced by which set of parents?
a. type A mother and type B father b. type A mother and type O father c. type AB mother and type O father d. type O mother and type O father e. type AB mother and type B father
Which postulate of natural selection is best supported by the work of Gregor Mendel?
a. Some individuals fail to survive and reproduce. b. Survival and reproduction are not determined by chance. c. Individuals in a population vary. d. Traits are passed from parent to offspring.