Which of the following is the best definition of antigen?
A) something foreign in the body
B) a chemical that elicits an antibody response and can combine with these antibodies
C) a chemical that combines with antibodies
D) a pathogen
E) a protein that combines with antibodies
B
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How long does it take for a biofilm to form?
a. seconds to minutes b. minutes to hours c. hours to days d. days to months e. months to years
The artery is located at the wrist, on the same side as the thumb.
Which of the following is an example of the
result of a beneficial mutation?
a. A new digestive enzyme that is better at digesting cellulose. b. A new digestive enzyme that is equal in its ability to digest cellulose as the existing enzyme. c. A new digestive enzyme that is less effective at digesting cellulose. d. A new protein that interferes with the digestive process. e. A new protein that has no function
The area where the land meets the sea is know as the
1.Intertidal zone
2.Nearshore environment
3.Neritic zone
4.Photic zone