Which of the following statements about the transition from ocean to land by plants is most likely to be accurate?

a) Rising sea levels favored individuals that were able to survive ever-drier conditions.

b) The high light levels of terrestrial systems favored individuals that contained flexible photosynthetic enzyme systems.

c) The transition to land occurred within a few generations.

d) The transition to land was likely gradual, with plants evolving traits that let them survive ever-drier conditions.

Apical meristems ________.

a) occur only in roots of plants

b) occur in both roots and shoots of plants

c) allow plants to move from one place to another

d) occur only in shoots of plants

Which of the following statements about stomata is accurate?

a) Stomata are not important in algae because they do not need CO₂.

b) Stomata are important in terrestrial plants because they allow CO₂ to diffuse into the plant.

c) Stomata, when closed, allow CO₂ to diffuse into plants.

d) Stomata are important in terrestrial plants because they allow the roots to absorb water and nutrients from the soil.