In a fixed volume when temperature increases , pressure does what?
also
in a fixed volume when temperature decreases, pressure does what?

When the volume is constant the pressure increases with temperature.  

Explanation:

Gay Lussac’s law precisely explains the relation between pressure and temperature of a system which has constant volume. In a system which has constant volume an increase in temperature indicates increase in temperature as well.

The reason behind the observation of this trend is the change in randomness of particles of the system.  

With increase in temperature the particle movement becomes random and fast. The particles hit the container walls at an increased rate and the pressure of the system increase.  

it's     c       this is a cell (b) with a nucleus (c) containing dna (a). the dna is organized into chromosomes (d). a section of the chromosome that codes for a trait is called a gene (e).

what statement best describes the difference between the sympathetic and parasympathetic nervous systems?

the sympathetic nervous system prepares the body for intense physical activity and is often referred to as the fight-or-flight response. the parasympathetic nervous system has almost the exact opposite effect and relaxes the body and inhibits or slows many high energy functions.