In sheep, eye color is controlled by a single gene with two alleles. When a homozygous brown-eyed sheep is crossed with a homozygous green-eyed sheep, blue eyes offspring are produced. If the blue eyed sheep are mated with each other, what percent of their offspring will most likely have brown eyes?
A. 0%
B. 25%
C. 50%
D. 75%
E. 100%
Ans: B. 25%
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Evolutionarily conserved molecules:
A. are similar in sequence among distantly related organisms. B. were likely present in the most recent common ancestor of the organisms possessing them. C. likely changed little over time because they serve a vital function. D. are similar in sequence among distantly related organisms and were likely present in their most recent common ancestor. E. are similar in sequence among distantly related organisms, were likely present in their most recent common ancestor, and have likely changed very little because they serve a vital function.
A research group led by Li Li has found a(n) ____ that potentially can be used in uranium
bioremediation.
a. amoeba b. plant c. alga d. bacterium e. fungus
A __________ dominates bryophyte life cycles. Fill in the blank(s) with the appropriate word(s)
Blood vessels that return blood from capillaries back to the heart are
a. arteries. b. veins. c. portal veins. d. arterioles.