Genes that normally block cell division are called:a
growth factor genes.
b. oncogenes.
c. tumor suppressor genes.
d. proto-oncogenes.
e. growth inhibiting genes.
C
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Which of the following statements does not describe a function of the lateral meristem?
A. Lateral meristems produce new cells. B. Lateral meristems allow plants to grow in diameter. C. New cells produced by lateral meristems grow in diameter and length. D. Lateral meristems produce the substance we commonly call wood. E. Lateral meristems are responsible for secondary growth.
Which of the following, produced from a blood protein as part of the chain of events in response to a significant drop in blood pressure, quickly raises blood pressure by constricting many arterioles?
a. atrial natriuretic factor b. renin c. aldosterone d. antidiuretic hormone e. angiotensin
The morphology of plants is determined
A. by cell division at the tip of the shoots and cell elongation at the tip of the roots. B. by cell division at the tip of the roots and cell elongation at the tip of the shoots. C. by cell elongation at both the tip of the shoots and the roots. D. by cell death (apoptosis) along the radial axis. E. by cell division at both the tip of the shoots and the roots.
In recombinant DNA techniques, the gaps in the paired DNA fragments are closed by ____
a. restriction enzymes b. DNA ligase c. DNA polymerase d. DNA replicase e. reverse transcriptase