One effect of auxin, which triggers the elongation of cells, is to affect cell walls by increasing their  

A.  permeability.
B.  plasticity.
C.  stiffness.
D.  thickness.
E.  water solubility.


B.  plasticity.

Auxin has many roles in a plant, two of which are to increase the plasticity (flexibility) of plant cell walls and stimulate stem elongation.

Biology & Microbiology

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You have type O blood (genotype ii). Who can you donate blood to in an emergency?

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You observe a tissue with one free surface and several cell layers attached to a basal lamina. This is an example of

____.

a. connective tissue only b. epithelial tissue only c. muscle tissue only d. nervous tissue only e. connective and muscle tissue

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Asexual reproduction

a. produces the events of meiosis. b. produces clones. c. is more like meiosis than mitosis. d. leads to increased variation in offspring. e. involves episodes of crossing over.

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In cohesion-tension theory, what molecular interactions allow water molecules to maintain a continuous fluid column as water is pulled from roots to leaves?

A. Ionic bonds B. Covalent bonds C. Hydrogen bonds D. Polar bonds E. Nonpolar bonds

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