Homologous chromosomes pair during ____________________
a. metaphase II.
b. prophase I.
c. metaphase I.
d. telophase I.
b
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If your physician suspects you have symptoms of a genetic disease, he can collect cells for genetic testing by
A. sampling your blood cells. B. sampling cells that line your mouth. C. sampling cells in your saliva. D. All of the answer choices are correct. E. sampling the tissue which is observed to be affected.
Rubbing a substance on uncoated paper should reveal if it contains
a. lipid. b. carbohydrate. c. protein. d. sugar.
Neurons 4591 and 4592 were just like all the other millions of neurons in the brain's center that are created during the first weeks of pregnancy. But in time Neuron 4591 became part of the brain that controls logic, while Neuron 4592 was in an area of the brain that manages emotion. Which process does this describe?
a. specialization b. differentiation c. migration d. proliferation
Which of the following vitamins is an essential nutrient in humans that cannot be synthesized by intestinal bacteria?
A) Biotin B) Vitamin B5 (pantothenic acid) C) Vitamin C (ascorbic acid) D) Folic acid E) Vitamin K