Indicate whether each of the following descriptions better applies to an adaptive (A) or innate (I) immune response. Your answer would be a four-letter string composed of letters A and I only, e.g. AAAA.
( ) It is found in invertebrate and vertebrate animals as well as in plants.
( ) It has a long-lasting memory.
( ) It is highly specific to the particular invading pathogen.
( ) It employs natural killer (NK) cells to induce apoptosis in infected host cells.

Question

Indicate whether each of the following descriptions better applies to an adaptive (A) or innate (I) immune response. Your answer would be a four-letter string composed of letters A and I only, e.g. AAAA.
( )	It is found in invertebrate and vertebrate animals as well as in plants.
( )	It has a long-lasting memory.
( )	It is highly specific to the particular invading pathogen.
( )	It employs natural killer (NK) cells to induce apoptosis in infected host cells.

Quizplus · Accepted Answer

The innate immune response constitutes the first line of defense, which employs general defense reactions and is short-lasting. Like the cytotoxic T cells of adaptive immunity, the NK cells of innate immunity can kill infected host cells by inducing apoptosis.

Indicate Whether Each of the Following Descriptions Better Applies to an Adaptive