Hominins are
A. chimpanzees and gorillas.
B. all forms of humans, extinct and extant.
C. the lesser apes.
D. arboreal primates.
Answer: B
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Rubisco has 16 subunits joined together to make a functional unit. Eight of the subunits are large, the other 8 are
small. On which subunit(s) is/are the active sites located?
a. on each of the 8 large subunitsb. on each of the 8 small subunits c. on one of the 8 large subunits d. on one of the 8 small subunits e. on each of the 16 subunits
Temporal isolation and mechanical isolation are reproductive isolating mechanisms that are classifiedas:a
homozygotic barriers. b. prezygotic barriers. c. heterozygotic barriers. d. postzygotic barriers. e. homozygotic barriers.
Biological systems use free energy based on empirical data that all organisms require a constant energy input. The first law of thermodynamics states that energy can be neither created nor destroyed
For living organisms, which of the following statements is an important consequence of this first law? A) The energy content of an organism is constant except for when its cells are dividing. B) The organism must ultimately obtain all the necessary energy for life from its environment. C) The entropy of an organism decreases with time as the organism grows in complexity. D) Organisms are unable to transform energy from the different states in which it can exist.
The earliest multicellular animals in the fossil record are
A) sponges. B) mammals. C) kelp. D) worms. E) trilobites.