The autonomic subdivision consists specifically of:
a. central and peripheral nerves
b. parasympathetic and sympathetic nerves
c. somatic and involuntary nerves
d. brain and spinal cord
e. spinal and cranial nerves
b
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The water vascular system of the sea star ________
a. is based on ampullae inside each of the tube feet, which contract to lengthen the foot for locomotion b. is a simple digestive system that expels coarse, undigested residues through the mouth c. is an open circulatory system d. flushes millions of eggs from the gonad
. If the nucleotide sequence ACTGAG represents the sticky end of a DNA molecule, to what other sticky end sequence
would it base pair?
a. TGACTC b. UGACUC c. ACTGAG d. ACUGUG e. GAGTCA
For the average person in the U.S., the largest source of radiation exposure is
A. background radiation. B. medical X-rays. C. irradiated food. D. consumer products. E. remote-controlled devices.
Lacewings are a common insect. How can you recognize their eggs.
a. They are always on the underside of leaves b. The eggs are bright red c. The eggs are on stalks d. The eggs are laid in a tight cluster near water