What are the disadvantages to being a social animal?
What will be an ideal response?
Living in groups increases competition within the group for resources, increases the risk to offspring from other members of the group, increases the risk of infection from contagious diseases, and increases the risk of being spotted by predators.
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The living portion of the pathway through which water travels through a root is called the apoplastic pathway
a. True b. False
Which of the following is NOT associated with lichens?
a. primary producers in the arctic tundra b. monitoring of air pollution c. creation of soil from bare rock d. enhanced photosynthesis on trees with lichens e. nest building material for many birds
Which structures found in ferns are lacking in
mosses?
a. spores b. gametophytes c. xylem d. sporophytes e. flagellated sperm
Which of the following statements is false?
a. The plasma membrane is more like a fluid than a solid. b. The cell membrane is symmetrical, so it is impossible to identify which is the extracellular surface. c. Calcium pumps move calcium ions across the membrane. d. In a plasma membrane, proteins shift positions and phospholipids flex their tails. e. There are functional differences between the two sides of the plasma membranes.