The presence of circular DNA in mitochondria and chloroplasts suggests that these organelles evolved from ____
a. bacteria
b. nuclei
c. single celled eukaryotes
d. anaerobic microorganisms
e. archaea
ANSWER: a
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a. fluorescence microscope b. phase contrast microscope c. compound microscope d. dissecting microscope e. electron microscope
Why can an insect eye detect motion better than the human eye?
a. Insects' eyes lack overlapping visual fields, and they are able to gather information from a narrow area. b. Insects have compound eyes that are very good for depth perception and hence detecting movement. c. The multiple ommatidia allow the insect eye to focus more acutely on an image. d. The lens of the insect eye is concaved, which provides better focusing capabilities than the convex lens of the human eye. e. The total range of vision for an insect eye is much narrow than that for a human eye
Structure across a dividing plant cell that signals the location of new plasma membranes and cell walls.
What will be an ideal response?
Which of the following characteristics do all viruses have in common?
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