A large regional community is
A. a biome.
B. the biosphere.
C. an ecosystem.
D. a trophic level.
A. a biome.
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Chromosomal islands are presumed to have a "foreign" origin based upon three observations. What are these observations and how do they indicate that chromosomal islands are "foreign" in origin?
What will be an ideal response?
Due to biological magnification, which would have the highest concentration of a chemical herbicide?
a. grass – the dominant primary producer b. cow – an herbivore c. grasshoppers – an herbivore d. mice – predators of butterflies e. hawk – predators of mice
The ____ would most likely contain blood that needs to be cleansed
a. renal vein b. renal artery c. nephron d. kidney e. bladder
Plants and fungi first became established on land during the
A) Archaean. B) Proterozoic. C) Paleozoic. D) Cenozoic.