The insoluble layer of aromatic alcohols that are primarily found in woody tissues are the

A) annulus.
B) cadherins.
C) proteoglycans.
D) lignins.
E) pectins.


D) lignins.

Biology & Microbiology

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The parts of the brain where addiction arises are

A) the suprachiasmatic nuclei, the ventricles, and the cerebral cortex. B) the nucleus accumbens, the ventral tegmental area, and the prefrontal cortex. C) the frontal medulla, the cerebellum, and the hypothalamus. D) the presynaptic neuron, postsynaptic neuron, and synapse.

Biology & Microbiology

Four of the five processes listed below apply to

conditions in which energy is released. Select the exception. a. endergonic reaction b. respiration c. entropy d. phosphorylation e. exergonic reaction

Biology & Microbiology

During which time period did shallow seas cover much of the land and another burst of evolutionary diversification

occur? a. Silurian period b. Permian period c. Devonian period d. Ordovician period e. Carboniferous period

Biology & Microbiology

The parasite (Leishmania/Toxoplasma/Trichomonas) is an obligate parasite that is incapable of surviving long outside the human host and is transmitted almost exclusively via sexual activity.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology