Which of the following is not located in the nucleus?
A) Chromosomes
B) Nucleolus
C) DNA
D) Endoplasmic reticulum
D
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The region of the earth inhabited by living organisms is called the
A. niche. B. ecosystem. C. community. D. biosphere.
Some fermented dairy products have been suggested to have beneficial effects, including a reduction in the incidence of colon cancer and the minimization of lactose intolerance.
Answer the following statement true (T) or false (F)
An ejaculate containing up to ________ percent abnormal spermatocytes is considered normal.
A) 10 B) 20 C) 40 D) 50
Imagine that a mutant mouse has a defect in the distribution of norepinephrine receptors, so that all the arteries and arterioles carry the type of norepinephrine receptor normally found around the brain and heart. What would you predict for this mouse in response to hemorrhage?
A. Blood vessels near the brain and heart will constrict, while blood vessels elsewhere will be dilated. B. Vasoconstriction near the brain and heart will prevent enough blood from reaching those organs. C. Blood vessels near the brain and heart will be dilated, while blood vessels elsewhere will constrict. D. Vessels throughout the body will stay dilated, resulting in inadequate blood flow to the brain and heart.