. A plant physiologist treats a leaf with abscisic acid and observes that the stomata close. What happened inside the guard cells during the experiment?
A. Abscisic acid influences the movement of sodium ions out of the guard cells.
B. Abscisic acid influences the movement of potassium ions out of the guard cells.
C. Abscisic acid binds carbon dioxide and causes carbonate crystals to block the stomatal opening.
D. Abscisic acid binds with auxins and induces water molecules to exit the guard cells.
E. Abscisic acid causes the guard cells to become more turgid.
B. Abscisic acid influences the movement of potassium ions out of the guard cells.
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What caused intense selective pressure for terrestrial vertebrates to evolve internal fertilization?
A. The eggs are too small for the males to find and fertilize. B. The gametes could not be released next to each other, as they would soon dry up. C. There is no mechanism for eggs and sperm to find one another. D. Terrestrial organisms only produce small quantities of gametes. E. Gametes and zygotes are vulnerable to predators.
Peat bogs primarily consist of _____
a. chytrids b. ferns c. liverworts d. hornworts e. mosses
Gomphoses
What will be an ideal response?
A(n) __________ is an area where all precipitation drains into a specific waterway, then on to groundwater, which becomes a source of water for plants.
Fill in the blank(s) with the appropriate word(s).