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A decrease in the birth rate will cause a decrease in population over time.
decrease the number of hawks
More predators so the population would decrease :(
go into war. that way the world population would decrease
The population of zoo plankton would decrease.
An increase in the autotroph populations
If the ozone depletes, UV will enter. This will cause an decrease in the penguin population.
it would decrease population
A population of an animal would decrease because of animal testing. 3/5 people agree.
Which would most likely decrease the genetic variation in the human population?
The grasshopper population.
The grasshopper population.