Dissolved phosphorus in aquatic ecosystems may return to the land via:a
erosion.
b. phosphate mining.
c. birds eating fish and mollusks.
d. zooplankton.
e. decomposition
c
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The number of bird species on islands near Papua New Guinea __________ as one gets farther from Papua New Guinea.
A. increases B. decreases C. is unknown D. shows an inconsistent pattern E. None of the choices are correct.
MHC plays a pivotal role in transplant rejection
Indicate whether this statement is true or false.
Based on the function it performs, which portion of the brain is considered the most ancient from an evolutionary perspective?
1.hindbrain
2.midbrain
3.forebrain
4.none of the choices (all are similar)
What caused the greatest mass extinction, in terms of species lost, at the end of the Permian?
A. Global cooling B. Sea level decline C. Asteroid impact D. Overhunting by humans E. Increased volcanic activity