Researchers exposed Caenorhabditis elegans to bacteria, which caused the parasite to use sexual reproduction instead of asexual reproduction. What advantage did C. elegans have in using sexual reproduction over asexual reproduction?
A. The offspring were unique, giving the roundworms a better chance of survival.
B. The offspring were identical, giving the roundworms a better chance for survival.
C. The offspring wer identical, giving the bacteria a greater chance to kill the entire population.
D. The offspring were unique, giving the roundworms a more energy-conserving type of reproduction.
E. All of the answer choices are correct.
A. The offspring were unique, giving the roundworms a better chance of survival.
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Assume that some members of an aquatic species of motile, photosynthetic protists evolve to become parasitic to fish. They gain the ability to live in the fish gut, absorbing nutrients as the fish digests food
Over time, which of the following phenotypic changes would you expect to observe in this population of protists? A) loss of motility B) loss of chloroplasts C) gain of a rigid cell wall D) gain of meiosis E) No changes would be expected.
As the total surface area of a cell increases, the surface area/volume ratio decreases
Indicate whether the statement is true or false.
Photophores of deep-sea fishes may harbor symbiotic bioluminescent bacteria
Indicate whether the statement is true or false
To initiate a signal transduction pathway, a signal binds to a receptor protein usually located in the
A) nucleus. B) plasma membrane. C) ER. D) cytoplasm.