The expression of the microRNA miR-4423 is ____ in lung tumors, and ____ its expression can decrease tumor size,
suggesting that a decrease in miR-4423 contributes to lung carcinogenesis.
a. increased; increasing
b. decreased; increasing
c. increased; decreasing
d. decreased; decreasing
e. increased; preventing
ANSWER: b
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Which of the following genetic processes may be most helpful in accounting for the Cambrian explosion?
A) binary fission B) mitosis C) random segregation D) gene duplication E) chromosomal condensation
Which of the following is NOT found in an arteriole?
a. elastic layer b. basement membrane c. smooth muscle d. valve e. endothelium
Hot flashes, insomnia and mood swings are characteristic of ____
a. menarche b. menopause c. gametogenesis d. menstruation e. ovulation
What is the function of the typical root and leaf structural shape?
A. To decrease surface area : volume ratio B. To increase surface area : volume ratio C. To increase growth rate D. To increase longevity