The most primitive digestive tract is seen in
A. insects.
B. salamanders.
C. nematodes.
D. earthworms.
E. birds.
Answer: C
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Which of the following enzymes is associated with the formation of peptide binds?
A) peptidase B) aminoacyl transferase C) peptidyl transferase D) peptide hydrolase E) inteins
Pheromones have the ability to modify reproductive behaviors in some animals
Indicate whether the statement is true or false
In saltatory conduction, nerve impulses jump from one exposed region of the axon to another. This exposed region is called the ________
A) interneurons B) motor end plate C) node of Ranvier D) Schwann cell gap
Which of the following statements concerning horizontal gene transfer is most correct?
a. Horizontal gene transfer only occurs in bacteria. b. Horizontal gene transfer occurs through sexual reproduction. c. Horizontal gene transfer has had a major effect on the evolution of life on Earth. d. Horizontal gene transfer has been extremely rare in all lineages. e. Horizontal gene transfer is a hypothetical phenomenon for which there is no actual evidence.