Which of the following hormones stimulates ovulation?
a. gonadotropin-releasing hormone
b. luteinizing hormone
c. follicle-stimulating hormone
d. estrogen
e. progesterone
B
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In tigers, a recessive allele causes a white tiger (absence of fur pigmentation). If one phenotypically normal tiger that is heterozygous is mated to another that is phenotypically white, what percentage of their offspring is expected to be white?
A) 50% B) 75% C) 0% D) 100% E) 25%
The prime culprit that produces coral bleaching
is
a. fungal infections. b. water levels changing. c. salinity levels changing. d. light levels changing. e. temperature changes
The group of protists to which you are most closely related is:
A. slime molds B. Rhizaria C. the choanoflagellates D. Stramenopila E. Foraminifera
Looking at the figure above, the 2 labelled roots represent which of the items listed below?
1. ancestral populations 2. the common ancestor of birds and crocodilians 3. the common ancestor to all tetrapods 4. the ancestral lineage from which all other lineages on the tree are derived a. Both (1) and (2) but not (3) and (4) b. Both (1) and (3) but not (2) and (4) c. Both (3) and (4) but not (1) and (2) d. (1), (2), (3), and (4)