You are planning a trip to San Diego, which is 1800 meters away from your home. If it is 2:00pm, what should your average speed be if you
want to be in San Diego by 3:00pm?

What if I cancel the plan of going San Diego then ?,

hahahahaha lol X D

ucd e e. rr. t t t t t t. to

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.