Why do mitochondria and chloroplasts have small genomes?
A. They have small genomes because their
bacterial ancestors did.
B. They have small genomes because they
do not need many genes to function.
C. They have small genomes because they
lack non-coding DNA.
D. They have small genomes because over
time, much of their nucleic acid has migrated
to the host cell nucleus.
D
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Bladder worms are found in
(a) proglottids in human feces. (b) proglottids in the human intestine. (c) improperly cooked pork. (d) none of the above.
Mitochondria and chloroplasts are thought to have arisen from:
A. endosymbiotic episodes. B. parasitic interactions. C. normal organelle development. D. None of these answers are correct.
Which groups of plants have at least some members that possess tissues capable of transporting water and nutrients?
_____ spermatophytes. _____ lycophytes. _____ bryophytes. _____ tracheophytes. _____ embryophytes.
When phosphorus is abundant in soils, it may by unavailable to plants because _____.
_____ the phosphorus is bound to nitrogen. _____ the phosphorus is unlimited. _____ the phosphorus is bound to clay. _____ the phosphorus is in a form that is not taken up by plants.