Multiple Choice
Which result is an observed effect of global warming on organisms?
A) Some species of birds and frogs now begin their breeding seasons earlier in the year.
B) Corals "bleach" when decreased water temperatures cause them to expel their symbiotic algae.
C) Many butterfly populations have shifted their ranges toward the equator.
D) Many polar bears produce more offspring as their hunting grounds increase in size.
Correct Answer:
Verified
Correct Answer:
Verified
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