The fight or flight system is a reaction that the body undergoes when put in an either stressful or frightening situation. It includes both the nervous and endocrine system.
The sympathetic division of the peripheral nervous system is used in this response as the sympathetic nervous system works up the body, increases the rate of breathing, heart rate, dilates the pupils, produce more sweat and slow the digestion rate. This reaction happens in the flight or fight system.
Two methods of producing transgenic mice are widely used: transforming embryonic stem cells<span> (ES cells) growing in tissue culture with the desired DNA; injecting the desired gene into the pronucleus of a fertilized </span>mouse<span> egg.</span>
The answer is A because D would be contradictory to your question, B only works if it's out of the water, and C makes no sense. So yeah, A they swim into cooler water. Hope this helps!
