What are the two main chemicals secreted by the gastric pits in the stomach?
What will be an ideal response?
hydrochloric acid and pepsin
Biology & Microbiology
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All cases of paralytic polio acquired in the U.S. between 1980 and 1999 were caused by Sabin's polio vaccine
Indicate whether this statement is TRUE or FALSE.
Biology & Microbiology
What initiates the molting process? a. Chronological stages of the life cycle
b. Changes in the environment. c. The general need to grow. d. Pheromones.
Biology & Microbiology
What type of speciation requires a geographic barrier?
A. sympatric speciation B. allopatric speciation C. Both sympatric and allopatric speciation require a geographic barrier. D. Neither sympatric or allopatric speciation require a geographic barrier.
Biology & Microbiology
Refer to Exhibit 4 A. The overall, net ionic charge on this peptide at pH = 7 would b
a. +2 b.+1 c. 0 c. -1 d. -2
Biology & Microbiology