Based on the evolutionary tree, which letter represents the common ancestor of all
eukaryotes?
a. A
b. B
c. C
d. D
A
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Height in tobacco plants is controlled by _____ gene pair(s) while height in peas is controlled by _____ gene(s)
1.one / many
2.one / two
3.two / four or more
4.two or more / one
What is the consequence of a mutation in the recA gene in bacteria?
What will be an ideal response?
Nesting geese will roll softballs (placed next to their nests by biologists) into their nests, perhaps because the balls resemble eggs that might have rolled out of the nest. This behavior is most likely
A) insight learning. B) conditioned. C) innate. D) habituation. E) trial-and-error learning.
Recombinant Dna technology is used by pharmaceutical companies to manufacture medications that cannot be maede by other means.
a. true b. false