What types of sedimentary rocks are formed from the remains of dead organisms

Limestone

Explanation:

Limestone is formed from dead organisms and can also form from calcite in lakes, seas, etc.

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.