At night, when you look at a star directly, the image of the star hits the fovea of your retina and you find it difficult to see it very clearly. This is because this area
a. is densely packed with rods.
b. is rod-free.
c. does not allow you to focus well.
d. is where you have your weakest vision.
Answer: b. is rod-free.
Psychology
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In about 1 in ______ conceptions, the zygote splits completely apart to create a multiple birth
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The main excitatory neurotransmitter in the nervous system that plays a role in memory and learning is
A) glutamate. B) GABA. C) acetylcholine. D) serotonin.
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