How do cells at the completion of meiosis compare with cells that are in prophase of meiosis I? They have _____
A) half the number of chromosomes and half the amount of DNA.
B) the same number of chromosomes and half the amount of DNA.
C) half the number of chromosomes and one-fourth the amount of DNA.
D) half the amount of cytoplasm and twice the amount of DNA.
C
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When conducting descriptive research, a scientist primarily uses:
a. control data. b. data. c. experiments. d. observational data. e. experimental data.
Which kind of chemical reaction involves the attachment or removal of a phosphate group?
A. oxidation-reduction B. acid phosphorylation C. phosphorylation D. hydrolysis
Which of the following settings constitutes an interpolation?
A. Using past sales, and price information to make a forecast for next year's sales growth. B. Using a randomized control trial to estimate the causal effect of the use of a cancer treatment on health outcomes. C. Using 2014 and 2016 data on GDP to estimate GDP in the third quarter of 2015, which is missing. D. Using past sales, and price information to estimate last year's price elasticity of demand.
In what environmental conditions are methanogens generally MOST active?
a. acidic pH b. anoxic c. basic pH d. high levels of organic carbon