Very short-term bursts of stress can have a beneficial effect on many biological systems, including the system, which is your body's frontline defense against infection and cancer.

a. nervous

b. respiratory

c. immune

d. circulatory

Very short-term bursts of stress can have a beneficial effect on many biological systems, including the immune system, which is your body's frontline defense against infection and cancer.

c

C) Immune

Explanation:

Very short-temr bursts of stress can have a beneficial effect on many biological systems, incuding the immune system, which is your body's frontline defense against infection and cancer.

g1

choices:

a. g2. b. g1. c. m

cell division has two checkpoints namely, g1

checkpoint and spindle assembly checkpoint. the checkpoint which determines if

division has properly occurred is the g1 checkpoint. at this point, is a damage

in the dna is detected or  the has not reach the optimum size, the cell is

stopped in g1 and is not allowed to proceed to further process.

source:

the correct answer is option b

behavioral response need communication and thus co-ordination at several levels such as interaction among cells, organ system and the entire organism.

behavioral response produces both internal and environmental stimulus.