Blood from the body is first received by the heart in
the
a. coronary vein.
b. left atrium.
c. right ventricle.
d. right atrium.
e. left ventricle.
Answer: d
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What has been detected in meteorites that have fallen to the Earth?
a. organic compounds b. organic polymers c. evidence of cells with a nucleus d. fossilized proto-cells e. oxygen molecules
You discover a green, filamentous multicellular eukaryote growing at the edge of a pond. How could you determine if the organism is a green alga or a plant?
a. Determine if the organism protects and nourishes its embryos. b. Determine if the organism protects its zygotes. c. Examine the cell walls to see if they are composed of cellulose. d. See if the organism stores its excess carbohydrates in the form of starch. e. Test for the presence of chlorophylls
Which of the following statements is TRUE regarding the light reactions?
A) Without water, the system would shut down. B) ATP and NADPH are needed. C) They rely on energy provided by glucose synthesis. D) Without photosystem I, photosystem II could not occur. E) Oxygen is required.
The cochlea is a coiled structure with fluid-filled
ducts that holds the mechanoreceptors responsible for hearing in its __________. Fill in the blank(s) with the appropriate word(s).