The alleles that control which A, B blood group antigens appear on the surfaces of red blood cells are
A) incompletely dominant.
B) variably expressed.
C) codominant.
D) semidominant.
C) codominant.
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In the food chain below, what does the garden spider represent? crabgrass—cricket—garden spider—blue jay—red-tailed hawk
A. herbivore B. primary producer C. primary carnivore D. secondary carnivore E. detritivore Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you already know about trophic levels? 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?
During signal transduction of a G protein, the first messenger binds to the receptor, and the G protein is activated
What happens next? a. formation of cAMP b. cellular response c. activation of protein kinase d. activation of adenylyl cyclase e. phosphorylation of the G protein
Refer to the accompanying figure in terms of a marine environment. What is the function of the structure labeled as A?
a. salt excretion
b. water gain by osmosis
c. drinking
d. removal of salts and nitrogenous wastes from the blood
e. release of nitrogenous wastes
Phospholipid molecules that prevent the alveoli from collapsing are known as ________
A) laryngitis B) plasma C) surfactant D) mucus