Stomata function to
A) control the entry and exit of O2, CO2, and water vapor from the plant surface.
B) prevent light from penetrating the plant surface.
C) prevent CO2 loss from the plant surface.
D) control the entry and exit of nutrients from the plant surface.
E) control the release of spores from the sporophyte.
Correct Answer:
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Q193: Which part of the moss life cycle
Q194: Dichotomous branching happens when
A) a shoot tip
Q195: Xylem and phloem are both types of
A)
Q196: Rhyniophytes were characterized by
A) dichotomously branching aerial
Q197: The addition of tracheid cells strengthened with
Q199: Liverworts can be distinguished from the other
Q200: In mosses, the protonema resembles filamentous green
Q201: Heterospory in a plant life cycle is
Q202: In the fern life cycle,
A) the mature
Q203: What does the figure show? 
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