In the United States, about 75% of children 7 years old and older have antibodies to astroviruses
Indicate whether the statement is true or false
TRUE
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When fisheries managers move fish from one lake to another, this causes gene ______.
A. mutation B. blending C. flow D. dominance
7. Identify the largest distinction between the theory of spontaneous generation and the cell theory.
A. Spontaneous generation can be observed with the microscope, while cell theory is newer and has not yet been proven. B. Spontaneous generation is found in organisms that don't have cells, while cell theory happens in organisms that do have cells. C. Spontaneous generation only happens with animalcules and germs, while cell theory applies to other, more complex organisms. D. Spontaneous generation proposes life can form from available molecule components, while the cell theory explains how all cells are formed from preexisting cells. E. There is no distinct difference between the two theories.
It is late at night and you are walking along a
dark sidewalk. In the bushes next to the sidewalk you hear something moving. Your heart starts beating fast, your pupils dilate, and you become very anxious. The neurotransmitter creating this effect is
a. acetylcholine. b. norepinephrine. c. dopamine. d. serotonin. e. an endorphin
A pleiotropic gene ____
a. acts on secondary sexual characteristics b. influences multiple traits c. is additive d. produces lethal effects when homozygous e. produces epigenetic effects