Why are roots essential for terrestrial plants?

A) They absorb carbon dioxide needed for photosynthesis.
B) They allow plants to obtain sun energy.
C) They absorb water and minerals needed for growth.
D) None of the above; plants can function without roots.


C

Biology & Microbiology

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Ehrlich and Raven hypothesized that if a new defensive trait evolves in a single plant species (or if a new trait to counteract a plant's defenses evolves in an herbivore species)

the appearance of that trait could result in a period of species diversification. Their hypothesis is also referred to as: A. the "diverge and converge" hypothesis. B. the "reverse and diverse" hypothesis. C. the "emit and commit" hypothesis. D. the "merge and diverge" hypothesis. E. the "escape and radiate" hypothesis.

Biology & Microbiology

Protective layers outside the bacterial cell membrane include:

a. cell walls only b. capsules only c. envelopes only d. cell walls and plasmids e. cell walls and capsules

Biology & Microbiology

The portion of a molecule which elicits an immune response is called

A) a mosaic. B) a hapten. C) an epitope. D) an alloantigen.

Biology & Microbiology

________ and ________ groups are negatively charged functional groups of carbon, whereas the ________ group is a positively charged functional group

Fill in the blank with correct word.

Biology & Microbiology