Which of these is an example of active immunity? a) vaccine b) antitoxin c) maternal antibody d) monoclonal antibody

Option A, Vaccine

Explanation:

In active immunity, antibodies are produced with in the body of an organism by introducing vaccines which is similar to exposing a body to antigen so that it starts producing antibodies in response to them which lasts longlife .

For example – when vaccines of  hepatitis A virus is given to a person, the antigens are introduced in an individual’s body which activates the immunity response system and allows the internal self-defense system to produce antibodies that will protect the body lifealong against the hepatitis A virus

i think it’s c but i might be wrong. if i am let me know! have a good rest of your day as well!

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.