During mitosis, what is the function of the mitotic spindle?
A. It separates the chromatids at the centromere.
B. It separates the cytoplasm to the new daughter cells.
C. It separates the two halves of the DNA double helix.
D. It re-forms the nuclear envelope.
E. It pulls together the replicated chromosomal strands.
Answer: A
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The wall of the left ventricle is thicker than the wall of the right ventricle because the
a. left ventricle must pump much more blood than the right ventricle so it must have stronger walls. b. right ventricle must pump much more blood than the left ventricle so it has a larger chamber to accommodate the blood and a correspondingly thinner wall. c. left ventricle must pump the same amount of blood into the high-resistance, high-pressure systemic system as does the right ventricle into the low-resistance, low-pressure pulmonary system. d. right ventricle must create higher tension within its walls. e. left ventricle must pump oxygenated blood, which requires more energy than pumping unoxygenated blood.
The palmar venous arches drain into the ________, which is superficial and runs along the medial upper limb.
A) digital vein B) cephalic vein C) axillary vein D) brachial vein E) basilic vein
Explain the role of exposure to antigens in the development of the immune system in the fetus and in the primary and secondary immune responses in children and adults. How does this compare to the role of innate immunity?
What will be an ideal response?
Which secondary brain vesicle forms the portion of the adult brain that includes the epithalamus, thalamus, and hypothalamus?
A. Telencephalon B. Diencephalon C. Myelencephalon D. Metencephalon E. Mesencephalon