Nucleosomes are best described as:
a. eukaryotic DNA associated with histone proteins.
b. prokaryotic DNA associated with nonhistone proteins.
c. eukaryotic DNA associated with nonhistone proteins.
d. prokaryotic DNA associated with histone proteins.
e. eukaryotic DNA associated with scaffolding proteins.
a
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Most skates are:
a. ovoviviparous. b. oviparous. c. live bearers. d. viviparous. e. broadcast spawners.
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An electrocardiogram is used to
A) measure the amount of blood leaving the heart with each contraction. B) measure the electrical activity of the heart. C) listen to heart sounds. D) correct a heart murmur. E) initiate angina pectoris.
Select all correct descriptions of changes that occur to the circulatory system of a pregnant woman.
e. increased renin-angiotensin-aldosterone activity d. relaxation of the smooth muscle in arteries c. increased blood volume d. All of the above