Scientists have a very complete fossil record showing the evolution of horses over millions of years, with the legs becoming longer and the teeth larger. These evolutionary changes were from the ancestry horse adapting from living in forests to the modern horse feeding on grasslands. This is an example of
A. gradualism.
B. a prezygotic barrier to evolution.
C. punctuated equilibrium.
D. adaptive radiation.
E. extinction.
A. gradualism.
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A single chromosome has
A. multiple genes, each with a single allele. B. a single gene with multiple alleles. C. multiple genes, each with multiple alleles. D. a single gene with a single allele. E. All of the answer choices are correct.
What happens to a molecule when it is phosphorylated?
a. It loses energy. b. It receives a phosphate group. c. It becomes denatured. d. It loses electrons and protons. e. It gains electrons.
Which digestive structure stores concentrated bile?
a. the gallbladder b. the stomach c. the pancreas d. the duodenum
Which of the following is an antioxidant?
What will be an ideal response?