Bryophytes are widely distributed, but vascular plants account for most terrestrial photosynthesis. Why? (Select all correct answer options.)
A. Bryophyte photosynthesis depends on
surface water.
B. Vascular plants can hydrate photosynthetic
cells using soil water.
C. Vascular plants are larger CO2 sinks than
bryophytes.
A,B
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Once heat is transferred to the soil, where does it go next (reference the study by Noormets et al. 2004)?
I) The heat is emitted back to the atmosphere. II) The heat is transferred to other soil layers. III) The heat is stored in the soil. A) only I B) only II C) only III D) only II and III E) I, II, and III
RNA differs from DNA in that it uses the nitrogenous base ______ instead of ______.
A) adenine; cytosine B) uracil; guanine C) cytosine; guanine D) uracil; thymine E) adenine; uracil
When examining ice cores for seasonal information, the summer layers appear __________
because the ice there is __________ dense.
a. dark; less b. dark; more c. light; less d. light; more
Which plant organs are often connected to a petiole, may be either simple or compound, and are typically the main organs of photosynthesis and gas exchange?
a. trichomes b. flowers c. stems d. leaves