Proteins produced by the immune system in response to the presence of an antigen are known as ________
Fill in the blank(s) with correct word
antibodies
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In pine trees the megaspores develop within a(n) ____
a. sporopollenin b. ovule c. seed d. strobilus e. pollen grain
Which two structures of the human digestive tract can be classified as endocrine glands since they
produce hormones?
a. liver and gallbladder b. liver and pancreas c. liver and small intestine d. pancreas and small intestine e. pancreas and stomach
All cells have some characteristics in common; both prokaryotic and eukaryotic cells have
A) a nucleus and a cell membrane B) DNA and a cell membrane C) cytoplasm, a plasma membrane, and a nucleus D) cytoplasm, a plasma membrane, and DNA E) a cell membrane and cytoplasm
The pentose phosphate pathway is important in the production of
a. pentose sugars. b. NADPH. c. glucose. d. pentose sugars and NADPH.