The evolution of horses is best characterized as
a. a linear sequence of intermediate forms leading to modern horses.
b. an example of evolutionary convergence.
c. poorly documented and speculative.
d. a gradual increase in body size.
e. a complex branched history with many extinct lineages.
E
You might also like to view...
How do immune cells with sensitivity to self-antigens become eliminated?
A. They are lysed through the action of membrane attack complexes. B. They are destroyed by macrophages. C. They undergo apoptosis. D. They enter a G0 state of cell cycle and cannot replicate.
Tertiary structure of a protein is stabilized by:
A) peptide bonds between amino and carboxyl groups on adjacent amino acids B) hydrogen bonds between amino acids C) addition of methyl groups D) an aqueous environment E) bonds between side chains of amino acids
Because most receptors are membrane proteins, which of the following is usually true?
A) They lead to changes in intracellular ion concentration. B) They open and close in response to protein signals. C) They are only attached to one membrane surface: exterior or interior. D) They preferentially bind with lipid or glycolipid signal molecules. E) They change their conformation after binding with signal polypeptides.
Ancient people often had knowledge of which of the following?
A) Edible shellfish B) the breeding patterns and genetics of whales C) Giant squid D) Life in the ocean depths