Programmed cell death that helps to sculpt body parts during morphogenesis is called:
a. necrosis
b. cell migration
c. apoptosis
d. remodeling
e. death induction
c
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Two parents who do not have sickle cell anemia have a child that has the disease. The parents are both:
A. homozygous for the sickle cell allele. B. heterozygous for the sickle cell allele. C. homozygous for the normal allele. D. epistatic for the sickle cell allele. E. pleiotropic for the sickle cell allele. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you already know about sickle cell anemia? How does it relate to the question? Consider Possibilities · What other information is related to the question? Which information is most useful? 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?
In addition to the defining features of chordates, ALL craniates are distinguished by which of the following combination of features?
A. a cranium and a gnathostome B. a cranium and neural crest C. a cranium and protostome development D. a cranium and an ostracoderm E. a cranium and an operculum
How many varieties of apples account for 90% of the apples sold in U.S. grocery stores today?
a. 5 b. 15 c. 25 d. 50 e. 150
In the sigmoid growth curve, the number of individuals at any one time is indicated by what symbol?
A. N/K B. K C. dN/dt D. ri E. N