The heart chamber with the thickest wall is the
a. left ventricle.
b. right ventricle.
c. right atrium.
d. left atrium.
e. both atria have equally thicker walls than
the ventricles
A
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The matched pairs of chromosomes within a diploid organism, such as a human, are described as which of the following?
a. homologous chromosomes b. heterologous chromosomes c. gametic chromosomes d. somatic chromosomes
To observe mitosis in onions, you choose to look at the root tip. This is because the root tip is the
A. vascular tissue. B. pericycle. C. dermal tissue. D. endodermis. E. apical meristem.
What bridges the gap between a neuron sending a message and the neuron receiving it?
a. threshold value b. action potential c. neurotransmitter d. cytoplasm e. dopamine
If the proportion of A bases in a DNA molecule is 22%, then:
A: There will be 22% T. B: There will be 28% G. C: There will be 50% A+G. D: A and B E: All of the above.