The number of copies of our genome in most of our cells is ________.
A) 1
B) 2
C) 3
D) 4
B) 2
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A tall plant is crossed with a short plant, and the progeny are all intermediate in size between the two parental plants. This could be an example of
A) incomplete dominance. B) polygenic inheritance. C) complete dominance. D) A and B E) B and C
Currently, the human population of the world
A. has reached its carrying capacity. B. is stable. C. is declining in much of the world. D. is increasing rapidly.
________ predict what happens, while ________ explain how and why something occurs
A) Observations; conclusions B) Theories; laws C) Observations; hypotheses D) Laws; theories E) Hypotheses; conclusions
Place the events in the transmission of an action potential in the correct order:1. An action potential begins in the receiving neuron. 2. Neurotransmitters are released into the synaptic cleft. 3. An action potential arrives at an axon terminal. 4. Calcium ions enter the axon terminal.5. Sodium ions diffuse into the receiving neuron.6. Synaptic vesicles fuse with the plasma membrane.7. Neurotransmitter molecules bind to the membrane of the receiving neuron.
A. 3,4,6,2,7,5,1 B. 7,6,5,3,4,2,1 C. 3,5,6,2,7,4,1 D. 2,3,6,7,4,5,1 E. 1,2,6,7,4,3,5