When a human eats a steak, the human is acting as a _____.
a. secondary consumer
b. primary consumer
c. tertiary consumer
d. producer
e. detritivore
Answer: a. secondary consumer
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In terms of alternation of generations, the internal parts of the pollen grains of seed-producing plants are most similar to a _____
A) moss sporophyte B) moss gametophyte bearing both male and female gametangia C) fern sporophyte D) hermaphroditic fern gametophyte E) fern gametophyte bearing only antheridia
Cellular respiration releases energy. In cellular respiration:
A. organic molecules such as carbohydrates are converted to chemical energy that can be used to do the work of the cell. B. the chemical potential energy stored in organic molecules is converted to chemical energy that can be used to do the work of the cell. C. chemical potential energy in the bonds of ADP is transferred to the chemical potential energy in the bonds of ATP.
Why do Rh-negative but not Rh-positive mothers sometimes have babies with hemolytic disease of the newborn?
A. This disease results when an Rh-negative mother's immune system is primed multiple times to produce anti-Rh IgG antibodies that can cross the placenta. If the mother is Rh-positive, she won't produce any anti-Rh antibodies at all. B. Rh-positive mothers produce IgM antibody, not IgG. This antibody can't cross the placenta, so it can't cause hemolytic disease of the newborn. C. Rh-positive mothers will receive a preventative shot from their physician prior to conception. This will provide the protection the fetus needs AFTER conception to avoid the disease. D. Rh-negativity is also associated with hyperproduction of antibodies. As such, Rh-negative mothers are more likely than Rh-positive mothers to produce the antibodies needed to produce this disease.
Which type of bond holds the two strands of DNA together?
a. ionic b. network c. polar covalent d. hydrogen e. non-polar covalent