Refer to the accompanying figure in terms of a marine environment. What is the function of the structure labeled as A?
a. salt excretion
b. water gain by osmosis
c. drinking
d. removal of salts and nitrogenous wastes from the blood
e. release of nitrogenous wastes
a
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Why is terrestrial productivity higher in equatorial climates?
A) Productivity increases with temperature. B) Productivity increases with water availability. C) Productivity increases with available sunlight. D) The answer is most likely a combination of the other responses.
Why can a person who is unable to produce insulin be successfully treated with insulin derived from genetically modified bacteria?
A. Bacterial insulin is similar enough to human insulin to serve the same purpose. B. Typical bacterial insulin is exactly the same as human insulin. C. The insulin-producing gene of bacteria was altered to have the same base sequence as the human counterpart and now produces the human version of insulin. D. The gene that produces insulin in humans was inserted into the bacteria where it continues to produce human insulin.
An individual who is at risk of passing a genetic defect onto his or her offspring would most likely undergo ____
a. genetic testing b. genetic screening c. enzyme replacement therapy d. preimplantation genetic diagnosis (PGD) e. amniocentesis
Mg2+ ions are required for optimal DNA polymerase activity
Indicate whether the statement is true or false