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
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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%
Which chlorophyll is the most common photosynthetic pigment among plants?
a. Carotenoids b. Chloroplast c. Chlorophyll a d. Chromoplast e. Chlorophyll b
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
The inflammatory process includes redness, heat, pain, loss of function, and:
a. pus drainage b. scabbing c. swelling d. scarring