Which of the following will occur in meiosis but not in mitosis?
A. metaphase
B. cytokinesis
C. crossing over
D. DNA replication
E. chromosome condensation
C. crossing over
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At first, the most important conflict between Darwin's and Mendel's theories appeared to be that ____
a. Mendel's theory was based on experimentation while Darwin's was based on observation b. Mendel's experiments were based on simple traits while Darwin's evidence was based on complex characteristics c. Mendel's experiments were unbiased, while Darwin set out to prove evolution by natural selection d. Mendel's experiments were based on peas while Darwin used a variety of examples e. Darwin was a scientist while Mendel was a monk
An artificial pacemaker supplements the actions of the
1.sympathetic nerves. 2.atrioventricular node. 3.medulla oblongata. 4.sinoatrial node. 5.heart muscle, itself.
When, how, and to what extent any gene control
mechanism comes into play depends on a. the type of cell. b. the cell’s function. c. the cell’s chemical environment. d. signals from the cells external environment. e. all of these.
A major risk factor in developing cardiovascular disease is
a. obesity. b. smoking. c. hypertension. d. lack of exercise. e. all of these