Which factor is most important in determining the distribution of organisms in aquatic biomes?
a. interspecies composition
b. dominant vegetation
c. distance from shore
d. salinity
e. intraspecies composition
d
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Cows are able to survive on a diet consisting almost entirely of cellulose because
A. cows are autotrophic. B. cows can manufacture all 20 amino acids out of sugars in the liver. C. unlike humans, the saliva the cow produces has enzymes capable of digesting cellulose. D. cows have cellulose-digesting, symbiotic microorganisms in their rumens.
Which of the following cells is NOT haploid?
a. secondary spermatocyte b. sperm c. primary oocyte d. spermatids e. polar bodies
What evidence supports the idea that some nuclei are totipotent?
a. Nuclei taken from the cells of an embryonic frog can direct an egg to develop into a tadpole. b. Nuclei taken from the cells of a frog embryo can direct an egg to develop into a tadpole. c. Nuclei taken from a different species can direct a tadpole egg to develop into a normal tadpole. d. Some cells are capable of undergoing unlimited cell cycles. e. Some cells are capable of arresting their cell cycle at will.
Imagine that a protein molecule is to be exported from a cell. Describe the pathway that the protein takes from the point of synthesis to export
What will be an ideal response?