Many studies have been conducted on the heritability of obesity. With fairly strong consistency they
indicate that the heritability of this trait is about:A.
0.1
B. 0.3
C. 0.5
D. 0.7
E. 0.9
D
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The research team used their experiments to study the incorporation of labeled nucleotides into a culture of lymphocytes and found that the lymphocytes incorporated the labeled nucleotide at a significantly higher level after a pathogen was introduced
into the culture. They concluded that _____. A) the presence of the pathogen made the experiments too contaminated to trust the results B) their tissue culture methods needed to be relearned C) infection causes lymphocytes to divide more rapidly D) infection causes cell cultures in general to reproduce more rapidly E) infection causes lymphocyte cultures to skip some parts of the cell cycle
Four of the five items listed below are
chloroplast features. Select the exception. a. stroma b. granum c. microbody d. pigment e. ATP
In order to arrive at a solution to a problem, a
scientist usually conducts one or more a. laws. b. theories. c. experiments. d. principles. e. facts.
A scientist wants to perform a test that will indicate whether a nucleic acid sample is composed of RNA or DNA. Testing for the presence of which of the following is most appropriate in this situation?
A) phosphate B) nitrogen C) guanine D) uracil E) thymine