Which layer of the digestive tract is actually in contact with the food?
A) muscularis externa B) mucosa C) serosa D) submucosa
Answer: B
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The osculum of a sponge is entirely blocked by a fungal infection. Predict what will happen.
A. Water will be unable to enter the sponge. B. Choanocytes will no longer be able to function. C. Digestion will be prevented from occurring. D. The flow of water out of the sponge will decrease.
In cellular respiration, the actual yield of ATP per glucose molecule is approximately:
What will be an ideal response?
The genetic engineering of human-animal hybrids is a routine procedure related to assisted reproductive technologies
a. True b. False
Aerobic respiration became established as a result of the evolution of ____.
A. the first protocells B. the first true cells C. metabolism D. the nuclear envelope E. the oxygen-producing pathway of photosynthesis