A likely scenario for causing the population trend shown in the diagram below is
A) the carrying capacity changed.
B) favorable environmental conditions caused a temporary population explosion above the carrying capacity.
C) a keystone predator was removed from the ecosystem at the point that the population began to decline.
D) primary succession began at the time when the population reached its peak.
B) favorable environmental conditions caused a temporary population explosion above the carrying capacity.
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Why is groundwater in an aquifer a nonrenewable resource?
A) It can take thousands of years for rainwater to percolate downward to recharge the aquifer. B) Once water is pumped out, it can never refill the aquifer because the rock changes its porosity. C) It is vanishing from earth for no apparent reason. D) The water in an aquifer comes from ancient seas trapped underground.
The most successful of Earth's animal phyla are the ____________, which include the lobsters, shrimp, crabs, krill,
and barnacles. Fill in the blank(s) with the appropriate word(s).
____________________ is moisture added to the atmosphere through plant life
Fill in the blank(s) with correct word
When atmospheric CO2 concentrations reach ________, scientists believe a possible climatic threshold in which Earth systems could transition in a chaotic mode will be reached
A) 300 ppm B) 350 ppm C) 400 ppm D) 450 ppm E) 500 ppm