Fecal coliforms are useful indicator organisms for the contamination of water by ________.
A. sewage
B. agricultural fertilizer runoff
C. phosphates
D. All of these choices are correct.
Answer: A
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True-breeding pea plants with inflated, yellow pods were crossed with true-breeding plants with constricted, green pods. The F1 progeny all had inflated, green pods
When the F1 is allowed to self-fertilize, what fraction of the F2 progeny will have constricted, yellow pods? A. 1/4 B. 3/4 C. 1/16 D. 3/16 E. 9/16
Populations can be described in terms of their diversity and stability
What will be an ideal response?
The circulatory system of cephalopods is closed, whereas that of all other mollusks is open. Explain
the difference between open and closed circulatory systems, and describe how each system is adequate for the groups possessing it. What will be an ideal response?
Gametophyte plants produce
A. spores. B. eggs. C. pollen. D. None of the above is correct.