Seagrasses are important in all the following except:
a. nutrient recycling.
b. providing a habitat for animals.
c. stabilizing sediments.
d. being consumed by most estuarine herbivores.
D
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Which statement is true?
a. The movement of solvent occurs from a hypotonic solution to an isotonic solution. b. The net movement from an isotonic to a hypotonic solution involves the movement of solute molecules only. c. The concentration of the solute is greater in an isotonic solution than in a hypertonic solution. d. The concentration of the solvent is greater in a hypertonic solution than in an isotonic solution. e. Osmosis involves only hypertonic solutions.
In a population characterized by type III survivorship, the probability of survival __________ with
age. a. increases b. decreases c. does not change d. first decreases then increases e. first increases then decreases
Which structure or structures function to open and close the stomata?
a. cuticle b. mesophyll c. palisade cells d. guard cells e. chloroplasts
Which of the following statements is true of the pine life cycle?
A) The pine tree is a gametophyte. B) Male and female gametophytes are in close proximity during gamete synthesis. C) Conifer pollen grains contain male gametophytes. D) Double fertilization is a relatively common phenomenon.