A pathogen enters an organism and infects it. Which statement best describes the general effect of the infection on the organism? *
A. The organism experiences a disruption in homeostasis.
B. The organism cannot obtain energy.
C. The organism cannot reproduce.
D. The organism experiences uncontrolled cell growth.

Option A, The organism experiences a disruption in homeostasis.

Explanation:

When a pathogen enters the organism’s body, it disrupts its homeostasis. There are several receptors in the body that are responsible for maintaining the stability of the body through negative feedback loop.  

A foreign element attaches to the surface of these receptors and hence disrupts their attachment with the probable substance necessary for the regulation of essential body function.

Thus, the temperature regulation get s impaired, hormonal imbalances occur, feeding system disturbs etc.

Hence, option A is correct

dynamic equilibrium is the answer.