If you close your eyes, hold your hands over your eyes for a short time, and then uncover your eyes, your pupils will be
A) a darker color than normal.
B) smaller than normal.
C) larger than normal.
D) a lighter color than normal.
Answer: C
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For most multicellular eukaryotes, including humans, mitochondria are inherited ____
a. only from the father b. from both the father and the mother c. from the mother for female offspring and from the father for male offspring d. randomly from either the father or the mother e. only from the mother
The accompanying figure shows the results of Jackson and Cheetham's studies on fossil and living cheilostome bryozoans. What can you infer from these diagrams?
A) Species of bryozoan have tended to persist with very little morphological change. B) Bryozoans have unusually low genetic diversity. C) Bryozoans predominantly evolve by phyletic transformation, or anagenesis. D) Bryozoans have suffered heavily from extinction events on islands. E) It is hard to define bryozoan species because of the presence of so many intermediate forms.
From which generation does the pollen grain develop?
a. from the female gametophyte b. from the female sporophyte c. from the male sporophyte d. from the male gametophyte
You decide to go on vacation in the mountains, where you are staying in a cabin. Unfortunately, when you turn on the water in the cabin you smell hydrogen sulfide (H2S) gas. After some research, you find out that the H2S may be due to the presence of sulfur bacteria living in your pipes. What molecule do these bacteria use as an electron acceptor?
A. O2 B. H2O C. H2S D. SO42-