Multiple Choice
Phytoplankton are ecologically important because they
A) are bioindicators of the amount of ice in the polar bear's ecosystem.
B) contribute to atmospheric oxygen through photosynthesis.
C) absorb acid to prevent ocean acidification.
D) are an important source of vitamins for polar bears.
Correct Answer:
Verified
Correct Answer:
Verified
Q59: Some chemicals and heavy metals bioaccumulate readily
Q60: Pikas,shown in the photograph,are adapted to mountainous
Q61: The example of cheetahs blinded by thorny
Q62: Atmospheric scientists anticipate a 1.1-6.4°C temperature increase
Q63: Global warming is causing the frequency of
Q65: Humans are particularly adept at water transformation;
Q66: Global levels of atmospheric carbon dioxide have
Q67: What characteristics would we expect to find
Q68: Humans use approximately 30 percent of the
Q69: Rainfall patterns around the world have changed