The primary function of the nucleus is
A) production of the cell's energy molecule, ATP.
B) serving as the site of most of the cell's chemical reactions.
C) serving as the site of ribosome synthesis of protein.
D) housing the cell's DNA.
E) digestion and processing of nutrients.
Answer: D
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Briefly describe the life cycle of an earthworm.
What will be an ideal response?
Lederberg and Tatum's experiments demonstrated that
A. bacteria can acquire genetic material from each other. B. bacteria do not release DNA into the environment for other bacteria to take up. C. bacteria must be in physical contact in order for bacteria to exchange genetic material. D. the genetic transfer occurred when the bio+, met+ phe-thr- strain transferred DNA to the bio-met- strain. E. All of these observations were made by Lederberg and Tatum.
What type of test is a CEA test?
A. self-examination B. a type of cervical cancer test C. a type of prostate cancer test D. a tumor marker test E. a genetic test
What are the two most common types of nonrandom mating?
What will be an ideal response?