Which animal is likely to have the circulatory pattern shown in the figure?
A. Mammal
B. Fish
C. Frog
D. Bird
E. Crocodile
Answer: C
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In plants, the ultimate electron donor in photosynthesis is ____
Fill in the blank with the appropriate word.
Which of these following marine ecosystems has the highest mean net primary productivity?
a. continental shelf b. estuaries c. kelp beds and reefs d. open ocean e. upwelling zones
In lactation, the more a baby suckles his mother's breast to obtain milk, the more milk is produced. This is an example of a
A. neutral feedback loop. B. negative feedback loop. C. positive feedback loop. D. stimulating feedback loop. E. None of these answers is correct.
The TCA cycle generates all of the following from each acetyl-CoA molecule oxidized except ________.
A. one FADH2 molecule B. two CO2 molecules C. three NADH molecules D. two ATP or GTP molecules