"Heartburn" is caused by
a. HCl sloshing back into the esophagus.
b. pepsin sloshing back into the esophagus.
c. pepsinogen sloshing back into the esophagus.
d. chymotrypsin sloshing back into the esophagus.
e. intrinsic factor sloshing back into the esophagus.
A
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Regarding the gastric cavity of the cnidarians, which of the following is true?
A. Digestion takes place in the stomach after storage in the gastric cavity. B. Excretion occurs through the same mouth opening through which food enters. C. Digestive enzymes allow the consumption of prey such as fish whole.
Which is true about prokaryotic (bacterial) RNA polymerase?
A. It is used during transcription. B. It does not require a primer. C. It has a detachable subunit, sigma factor, which recognizes the promoter. D. It reads the template in the 3'-5' direction. E. All of the choices are true.
Most true fungi send out cellular filaments called ____
a. mycelia b. hyphae c. mycorrhizae d. stolons e. rhizoids
Root hair development is under the control of two genes that code for transcription factors
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