Which of the following is not a characteristic of osmosis?
a) Water flows from an area of low solute concentration to an area of high solute concentration.
b) It occurs across a membrane freely permeable to water.
c) It occurs across a membrane freely permeable to solutes.
d) It is a passive process.
Ans: c) It occurs across a membrane freely permeable to solutes.
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If the gametes of an organism are different morphologically, they are said to be __________
A. isogamous B. heterogamous C. diploid D. haploid
The Xist gene product
A. is never translated into protein. B. is required for the production of Barr bodies. C. coats the X chromosome with RNA. D. associates with proteins to compact the chromosome. E. All of these statements are correct.
Which of the following statements is false?
a. Neurons in the brain can interpret incoming action potentials only in certain ways. b. Optic nerve impulses can only be interpreted as light. c. Sensory neurons do not follow the all-or-none law. d. The stronger the stimulus, the more action potentials are generated. e. A strong stimulus activates many adjacent receptors, thereby increasing the number of action potentials and the level of awareness for the stimulus.
Permafrost, or permanently frozen subsoil, characterizes ________
A) temperate broadleaf forest B) chaparral C) tundra D) coniferous forest