Hey guys could you help me??? What does a chromosome consist of?

A.
tightly wound DNA and proteins
B.
tightly wound DNA only
C.
loosely dispersed DNA
D.
loosely dispersed DNA and proteins

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.

is this for the e2020 class

what school and grade?

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.