Why is the coral endosymbioant, zooxanthellae, sensitive to global warming?
What will be an ideal response?
High temperatures damage the reaction center of Photosystem II in zooxanthellae
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A point mutation is when a single nucleotide gets replaced by a different one
A. true B. false
Fossil evidence shows that Tiktaalik had both lungs and gills, indicating that it could
A. absorb oxygen only from the water.
B. take in food for nutrition from the air or the water.
C. absorb oxygen from both air and water.
D. absorb oxygen only from the air.
E. take in food for nutrition through the gills, but breath the air for oxygen.
In general, there is about a ______ percent loss of energy as we proceed from one trophic level to the next higher level.
A. 90 B. 80 C. 60 D. 50
Which of the following environmental factors makes microbial populations resistant to antimicrobial agents?
A) Ability to form a biofilm B) Acidic conditions C) Presence of organic matter D) All of the above