A cell is placed in a solution that is hypotonic to the cell. Which of the following best describes movement of water in this situation?
a. Water will only flow into the cell.
b. Water will only flow out of the cell.
c. Water will flow into and out of the cell, but the overall net movement will be out of the cell.
d. Water will flow into and out of the cell, but the overall net movement will be into the cell.
Answer: d. Water will flow into and out of the cell, but the overall net movement will be into the cell.
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A host plant race may develop ____
a. only when an organism’s genes for the host choice change b. only when an organism’s genes for mating preferences change c. only when a geographical barrier exists d. when genes for the host choice mating preferences change e. when genes for mating preferences change and geographical barriers exist
On the island of Madeira, two populations of house mice have accumulated different Robertsonian translocation. Which are true about these two populations of mice? (Select all that apply.)
A) They have fewer chromosomes than mice in other areas of the world. B) They are isolated from each other geographically. C) If mice from different populations mate, their offspring are sterile. D) Mice from different populations are unable to mate with each other. E) They are becoming extinct because of semi sterility.
In polygynous mating systems:
a) there is usually greater variation in reproductive success among males than among females. b) paternal care is by all the parents. c) most individuals mate for life. d) there is usually greater variation in reproductive success among females than among males. e) there is usually equal variation in reproductive success between females and males.