In the food chain below, which population will most likely decrease if snakes are removed from the food chain? grass- > grasshopper -> frog -> snake -> hawk
A. grass
B. grasshopper
C. frog
D. hawk
Answer: D. hawk
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Which organism is indole and gelatin positive but does not have the ability to oxidize mannitol?
a. S. multivorum b. CDC group O-1 c. E. brevis d. E. meningoseptica
Each of the following statements accurately describes the Calvin cycle except
A) It is found in all oxygenic and most anoxygenic phototrophs. B) Carbon dioxide is fixed by reduction to form organic sugars. C) Its products enter a variety of metabolic pathways including sugar and starch biosynthesis. D) It involves ribulose-1,5-bisphosphate (RuBP). E) It is confined to the cytoplasm in plants and algae.
Which of the following is glycerol?
A. C3H5(OH)3 B. C6H12O6 C. C14H28O D. C2H5O2N
Development of the human embryo's heart begins in the ________ week.
A. 16th B. 6th C. 1st D. 3rd E. 24th