Which is an accurate statement regarding the structure of a neuron?
a. Dendrites carry impulses away from the cell body.
b. Nodes of Ranvier are gaps between myelinated axon segments.
c. Nerve impulses travel along the axon toward the cell body.
d. Dendrites are often myelinated for faster conduction.
e. Myelin is a fatty material produced and secreted by the axon.
b
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Until the discovery of ________, enzymes were the only recognized biological molecules that were catalytic.
Fill in the blank(s) with the appropriate word(s).
Digested white sugar is broken into ——and ——.
a. glucose, lactose b. glucose, fructose c. sucrose, maltose d. fructose, sucrose
In some families, members inherit a mutant allele that causes a(n) ____________________ to cancer
Fill in the blank(s) with correct word
What organism is at the first trophic level in a tallgrass prairie ecosystem?
a. birds b. grasshoppers c. grasses d. decomposers e. parasites