Angiotensin II acts directly in the hypothalamus to stimulate what?
A) the release of oxytocin
B) an increase in body temperature
C) the release of aldosterone
D) an increase in thirst
E) a systemic increase in blood pressure
Answer: D) an increase in thirst
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Why would an iron deficiency result in anemia?
What will be an ideal response?
Genetic divergences may ultimately lead to
a. new variations. b. new species. c. new gene frequencies. d. new competition. e. new alleles
In a certain breed of chicken, an incomplete dominant gene controls color. The homozygous black,
when crossed with the homozygous splashed-white, produces an intermediate gray color pattern referred to as blue. A second gene controls the shape of the comb. The dominant allele (R) produces rose, whereas the recessive allele (r) produces single. Give the F1 and F2 genotypic and phenotypic ratios of a cross between a pure-breeding black single and a pure-breeding splashed-white rose. What will be an ideal response?
Which chromosomes are carried by a normal female bird?