In animals with a brain, the two major divisions of the nervous system are the ____
a. autonomic and peripheral nervous systems
b. central and peripheral nervous systems
c. brain and spinal cord
d. nerves from the brain and the peripheral nervous system
e. cranial and spinal nerves
ANSWER: b
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The "one-gene/one-enzyme" hypothesis was proposed by
A. Watson and Crick. B. Griffith. C. Garrod. D. Franklin. E. Beadle and Tatum.
Most allergy medicines contain antihistamines that block the actions of histamine. These drugs reduce cold symptoms by directly
A. lysing virus-infected cells and preventing further propagation of the pathogen. B. stimulating components of the immune system through the release of cytokines. C. blocking or reducing the inflammation response in mucous membranes. D. stimulating the production of specific antibodies. E. recruiting macrophages to the nasal epithelium.
What name is given to a gene that is always expressed?
What will be an ideal response?
Carbon Cycle picture
What will be an ideal response?