By what age are babies first able to grasp an object with the thumb and fingers?
A. 10 months
B. 8 months
C. 6 months
D. 4 months
Answer: B
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What is one likely explanation for why horses evolved a tendency to sleep few hours per night? a. They have less need than other species to consolidate their memories. b. They eat a diet that is unusually rich in calories
c. They are at high risk of being attacked during their sleep. d. They have higher body temperatures than most other mammals.
During an action potential, the "gates" covering the axon's ion channels pop open to allow which ions to rush into the axon?
a. sodium b. potassium c. chlorine d. iodine
What binds only to specific receptors?
What will be an ideal response?
Which of the following is one of the five primary types of anxiety disorders recognized in the DSM-5?
a. hypochondriasis b. agoraphobia c. dissociative fugue d. bipolar disorder