Which pair of species would be expected to have fewer genetic differences: orangutans and gorillas or gorillas and humans? Why?
A. Gorillas and humans because their common ancestor (C) is more recent than that of orangutans and gorillas (B).
B. Gorillas and humans because their common ancestor (D) is more recent than that of orangutans and gorillas (C). C. Gorillas and orangutans because their common ancestor (B) is more ancient than that of humans and gorillas (C).
D. Gorillas and orangutans because their common ancestor (C) is more ancient than that of humans and gorillas (D).
A. Gorillas and humans because their common ancestor (C) is more recent than that of orangutans and gorillas (B).
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) ________ are a class of enzymes responsible for the movement of functional groups from one molecule to another.
Fill in the blank(s) with the appropriate word(s).
What type of curve is depicted in a graph of the relationship between the size of a region and the biodiversity that it can support?
A) habitat loss B) biomass C) overexploitation D) species-area
Which statement about the beak size of finches on the island of Daphne Major during prolonged drought is true?
A) Each bird evolved a deeper, stronger beak as the drought persisted. B) Each bird's survival was strongly influenced by the depth and strength of its beak as the drought persisted. C) Each bird that survived the drought produced only offspring with deeper, stronger beaks than seen in the previous generation. D) The frequency of the strong-beak alleles increased in each bird as the drought persisted.
All of the following statements about the cohesion-tension model are true EXCEPT
A. it is a model of how water and minerals are transported in xylem. B. it is dependent on the cohesive and adhesive properties of water. C. there is no expenditure of energy. D. tension created by transpiration in the leaves pulls water along the phloem from the roots hairs to the leaves.