Which of the following did plants develop to deter predation by herbivores on land?
a. Metabolizing carbon dioxide
b. Developing more rigid cell walls
c. The emergence of thorns, spines, and toxic chemicals
d. Alternation of generations between haploid and diploid
c. The emergence of thorns, spines, and toxic chemicals
Plants evolved many strategies for colonizing land, including the development of thorns, spines, and toxic chemicals to deter predation by land-dwelling herbivores.
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a. phospholipids and cellulose b. phospholipids, protein, and sterols c. protein and sterols d. glycolipids and proteins e. phospholipids and glycolipids
What is an action potential?
A. The potential that your body has to complete a movement B. The collection of dendrites that make up a neuron C. The movement of hormones in your body D. The electric signal used by neurons to transfer information
Which of the following sequences correctly describes the movement of air in a bird's respiratory system?
a. lungs; anterior air sacs; posterior air sacs b. anterior air sacs; posterior air sac; lungs c. posterior air sacs; lungs; anterior air sacs
d. lungs; posterior air sacs; anterior air sacs e. anterior air sacs; lungs; posterior air sacs
Which of the following is the part of a flower that contains the female reproductive structures?
A) carpel B) stamen C) sepal D) petal