A large regional community is 

A. a biome.
B. the biosphere.
C. an ecosystem.
D. a trophic level.


A. a biome.

Biology & Microbiology

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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?

Biology & Microbiology

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

Biology & Microbiology

The ____ would most likely contain blood that needs to be cleansed

a. renal vein b. renal artery c. nephron d. kidney e. bladder

Biology & Microbiology

Plants and fungi first became established on land during the

A) Archaean. B) Proterozoic. C) Paleozoic. D) Cenozoic.

Biology & Microbiology