After fertilization, which hormone is secreted by the developing embryo to maintain the function of the corpus
luteum?
a. GnRH
b. FSH
c. hCG
d. ACTH
e. LH
c
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The 3' cleavage and polyadenylation of mRNA is partly defined by the sequence:
A. AAUAAA. B. AAAAAA. C. CCCGGG. D. GCGCGC.
Ideal agricultural soil is:
a. loam. b. silt loam. c. sandy loam. d. clay loam. e. sandy.
Which of the following is the correct sequence for stages of Ehrlichia development in infected host cells?
A) initial body, morula, elementary body B) morula, elementary body, initial body C) initial body, elementary body, morula D) elementary body, initial body, morula E) morula, initial body, morula, elementary body
In the Arabidopsis cdka;1 mutant the central cell of the female gametophyte is not fertilized. What structure will not form in these mutant plants?
A. endosperm B. pollen tube C. synergids D. egg cell