The discovery that there are three kinds of cones, each with a different absorption spectrum, supports the __________ or trichromatic theory of color vision
Fill in the blank with the appropriate word.
Answer: component
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What are stem cells?
a. Cells that form the tip of the spinal cord b. Cells that stimulate the body's organs for brief, vigorous activity c. Cells that contribute to the immune response when someone is ill d. Undifferentiated cells that can develop into other types of cells
If channels in the outer membrane of a neuron were blocked, what would be the consequence?
a. Membrane fluidity would be impaired and the neuron would undergo apoptosis. b. Osmosis would be disrupted and the neuron would be unable to communicate. c. Many chemicals would not be able to move into and out of the neuron, disrupting communication. d. The neuron would be deprived of oxygen and would undergo necrotic death.
The author of your text probably believes that most childhood tantrums are due to unintentional shaping by adults
Indicate whether the statement is true or false
In the United States, almost ________ of teenagers will become pregnant before they are 21 years old
A) one quarter B) 45% C) one in three D) 10%