Algal blooms deplete the water of
a. oxygen.
b. carbon dioxide.
c. nitrogen.
d. phosphorus.
e. calcium.
A
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What is the advantage of the proofreading function of DNA polymerase?
A. All DNA mutations can be detected and repaired during DNA replication. B. DNA polymerase is always present in the nucleus and can repair all mutations when they occur. C. DNA polymerase can be recruited to recently mutated sites to repair mutations. D. DNA polymerase can repair most mutations as they occur during DNA replication.
Not all animals are able to hear. The sense of hearing exists in organisms of the phyla
_____ arthropods. _____ mollusks. _____ vertebrates. _____ cnidarians.
Which of the following is a mitochondrial disease?
a. Lou Gehrig's disease b. Leber's hereditary optic neuropathy c. Crohn's disease d. I-cell disease
Which of the three domains includes organisms that would be most likely to survive the environmental conditions that existed on Earth nearly 4 billion years ago?
A. Eukarya B. Bacteria C. Archaea