Which of the following statements is correct regarding DNA and RNA?
A. DNA and RNA both leave the nucleus after being produced.
B. DNA and RNA both stay in the nucleus after being produced.
C. DNA remains in the nucleus at all times; RNA is produced in the nucleus but then leaves the nucleus.
D. RNA remains in the nucleus at all times; DNA is produced in the nucleus but then leaves the nucleus.
Answer: C
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Which one of the following types of culture media is selective and differential?
A) blood agar B) MacConkey agar C) phenylethyl alcohol agar D) Thayer-Martin agar
Pathogenic microbes that cause disease in healthy people are called ________.
A. opportunistic pathogens B. indigenous biota C. normal biota D. micropathogens E. true pathogens
Hormones are a class of signaling molecule carried by the ___________________ to target cells. Fill in the blank(s) with the appropriate word(s)
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Figure 36.3
Use the figure above to answer the following question.
A fish circulatory system is indicated by the letter (s) ____.
A. A only B. B only C. C only D. both A and B E. both B and C