Choose all the characteristics that are true about "active immunity."

> It protects the body against a new infection thanks to antibodies developed by the host during the first exposure to the antigen.
> It requires several days to develop.
> It can last for a relatively long time, sometimes for life.
> Active immunity can be stimulated only by artificial means.
It protects the body against a new infection thanks to antibodies developed by the host during the first exposure to the antigen.
It requires several days to develop.
It can last for a relatively long time, sometimes for life.


> It protects the body against a new infection thanks to antibodies developed by the host during the first exposure to the antigen.
> It requires several days to develop.
> It can last for a relatively long time, sometimes for life.

Biology & Microbiology

You might also like to view...

Trichophyton schoenleinii causes a condition that is characterized by the formation of yellowish cup-shaped crusts or scutulae, considerable scarring of the scalp, and sometimes permanent alo-pecia. This organism is usually recovered in _____ days

a. 5 to 7 b. 14 c. 21 d. 30

Biology & Microbiology

The muscle and bone tissues of adults are derived from the embryonic tissue layer called the ________

Fill in the blank(s) with correct word

Biology & Microbiology

Identify and briefly describe the labeled structures in the cross section of the vertebrate embryo.

What will be an ideal response?

Biology & Microbiology

What other enzyme is the Cas9 enzyme most similar to?

A) DNA polymerase B) DNA ligase C) a restriction enzyme D) reverse transcriptase

Biology & Microbiology