After fertilization, the zygote undergoes a round of divisions in a process called ____
Fill in the blank with the appropriate word.
cleavage
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A friend asks you to explain the difference between atherosclerosis and arteriosclerosis. You say, "Well
A. atherosclerosis and arteriosclerosis are nearly the same and usually occur after a stroke." B. atherosclerosis is a condition that results from having angina pectoris occurring in the arteries of the heart, while arteriosclerosis results from the accumulation of cholesterol deposits in the arteries." C. atherosclerosis is a condition that results from the accumulation of cholesterol deposits in the arteries, while arteriosclerosis results from too much calcium being deposited in the arteries." D. atherosclerosis is a condition that results from too much calcium being deposited in the arteries, while arteriosclerosis results from the accumulation of cholesterol deposits in the arteries." E. atherosclerosis is a condition that results from too much calcium being deposited in the arteries, while arteriosclerosis results from having angina pectoris occurring in the arteries of the heart."
Two-component complex
What will be an ideal response?
You are planning to perform some protein-protein interaction studies to identify a receptor for a steroid hormone you have been working on. You start by fractionating the cell. What cell fraction would you want to work with to identify the steroid hormone receptor of interest?
A. the mitochondrial fraction B. the cytoplasmic fraction C. the extracellular fraction D. the ribosomal fraction E. the plasma membrane fraction
Multicellular organisms probably arose first about 1 billion years ago, resulting in a burst of diversification of organisms and their movement onto land.
a. true b. false