What hormone stimulates the production of cortisol?
A. gonadotropic hormone
B. growth hormone
C. adrenocorticotropic hormone
D. antidiuretic hormone
E. thyroid-stimulating hormone
Answer: C
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What type of cellular damage in a malarial parasite would prevent it from penetrating a red blood cell?
A. Mutation in the variable surface glycoprotein genes B. A disruption of the cytoskeletal proteins C. Failure of the cross-linking of the peptidoglycans D. Damage to the choanocytes Clarify Question · What is the key concept addressed by the question? Gather Content · What type of thinking is required? · What do you already know about Plasmodium? How does it relate to the question? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
What is the genotype of the females that gave rise to these progeny?
Females heterozygous for the recessive second chromosome mutations px, sp, and cn are mated to a male homozygous for all three mutations. The offspring are as follows:
A) px+sp cn / px sp+cn+
B) px+sp cn+ / px sp+cn
C) px+sp+ cn+ / px spcn
D) pxsp cn+ / px+ sp+cn
E) insufficient data
A consequence of organelle heredity is that sequence changes in mtDNA vary more than nuclear DNA in response to reduction in population size. Which of the following does this imply about human evolutionary history?
A) Current human populations must have a much higher mutation rate than ancient populations. B) Mitochondrial variants in people descending from originally small populations show enough diversity to be used to construct an evolutionary tree. C) The original human population must have grown to be quite large before its members began migrating to other lands and other continents. D) Nuclear gene sequencing must be used to resolve the question of human ancestral origins. E) A single human population, living about 200,000 years ago, could not have given rise to all current human populations.
Both smooth muscle fibers and cardiac muscle fibers:a
have striations. b. are under involuntary control. c. are multinucleate. d. have a comparable intermediate resistance to fatigue. e. have a comparable intermediate speed of contraction.