E. coli bacteria normally live in the human gut and produce vitamin K that the body uses. This is best termed a ________ relationship.
A. mutualistic
B. antagonistic
C. parasitic
D. saprobic
Answer: A
You might also like to view...
Why do we think that male Neanderthals mated with non-African ancestral Homo sapiens?
A. Because Neanderthal mtDNA sequences are present in the human gene pool, and Neanderthal nuclear DNA sequences are not. B. Because neither Neanderthal mtDNA sequences nor nuclear DNA sequences are present in the modern human gene pool. C. Because Neanderthal nuclear DNA sequences are present in the human gene pool, and Neanderthal mtDNA sequences are not. D. Because both Neanderthal mtDNA sequences and nuclear DNA sequences are present in the modern human gene pool.
Sperm mature and are stored in the epididymis
a. True b. False Indicate whether the statement is true or false
When gated sodium and potassium channels open during an action potential, what direction do the ions flow?
a. They both flow from interstitial fluid into the cytoplasm. b. They both flow from the cytoplasm to the interstitial fluid. c. Sodium flows from the cytoplasm to the interstitial fluid and potassium flows the opposite direction. d. Sodium flows from the interstitial fluid to the cytoplasm and potassium flows the opposite direction. e. Potassium flows from the interstitial fluid to the cytoplasm and sodium flows the opposite direction.
What are the protobionts produced by abiotically produced polypeptides?
a. polybionts b. prokaryotes c. microspheres d. peptidebionts e. stromatolites