The yolk of an animal egg has what type of analog in angiosperms?
A) endosperm
B) carpels
C) fruit
D) seed coat
A
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Which algebraic expression would be used to denote a trisomic organism?
A. 3n B. 2n - 1 C. 2n + 1 D. 2n + 2
Why isn't oxygen produced by organisms that perform anoxygenic photosynthesis?
a. their photosystems do not utilize the Calvin cycle b. they use a different enzyme for the initial reactions of the Calvin cycle c. they use electron donors other than water d. their membranes lack ATP synthase e. their chlorophyll contains an iron center rather than magnesium
Distinguish between quantitative and qualitative variation
What will be an ideal response?
If the frequency of a recessive gene in a
population under genetic equilibrium is 40 percent, in the next generation the frequency of that gene would be a. 20 percent. b. 40 percent. c. 80 percent. d. 2pq. e. unpredictable.