A developing embryo which lacks an SRY gene will develop into a
a. develop into a male.
b. develop into a female.
c. develop without gonads.
d. develop gonads of both
Answer: b. develop into a female.
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A seed that lands in the forest soil is homozygous mutant for the LEAFY (LFY) gene, and as a result does not produce any functional LEAFY protein. What do you predict will happen during the development of this seed?
A. It will germinate and grow vegetatively, but will never produce flowers. B. It will fail to germinate. C. It will germinate and immediately produce flowers. D. It will germinate and grow vegetatively. It will only develop flowers if it is from a species regulated by the autonomous flowering pathway. 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 flowering and the LEAFY gene? What other information is related to the question? Choose Answer Given what you now know, what information 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?
Before an animal cell’s membrane fuses with a virus, the virus must first:a
duplicate its DNA. b. use enzymes of the plasma membrane to break down its capsid. c. replicate itself to attack numerous sites of the plasma membrane. d. extend its tail fibers to sense the plasma membrane of the host cell. e. attach to a specific receptor on the plasma membrane of the host cell.
In fermentation, ________ is ________
A) NADH; reduced B) NAD+; oxidized C) NADH; oxidized D) ethanol; oxidized
A phospholipid molecule has a polar and a nonpolar end. Because of this, water molecules form
A. hydrogen bonds with the polar end of the phospholipid molecule. B. polar bonds with the nonpolar end of the phospholipid molecule. C. polar bonds with the polar end of the phospholipid molecule. D. hydrogen bonds with the nonpolar end of the phospholipid molecule. E. covalent bonds with the nonpolar end of the phospholipid molecule.