Which of the following is not true of a myelin sheath?

a. Myelin sheaths have numerous gated sodium channels

b. A myelin sheath is made up of Schwann cell neuroglia.
c. A myelin sheath speeds up action potentials.
d. It acts as an electrical insulator.


a

Biology & Microbiology

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When crossing an organism that is homozygous recessive for a single trait with a heterozygote, what is the chance of producing an offspring with the homozygous recessive phenotype?

A) 0% B) 25% C) 50% D) 75% E) 100%

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Which chlorophyll is the most common photosynthetic pigment among plants?

a. Carotenoids b. Chloroplast c. Chlorophyll a d. Chromoplast e. Chlorophyll b

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A bird comes in a range of phenotypes, from white through gray to black. Disruptive selection favors the gray phenotype

Indicate whether the statement is true or false

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The inflammatory process includes redness, heat, pain, loss of function, and:

a. pus drainage b. scabbing c. swelling d. scarring

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