List three pollutants the burning of fossil fuels adds to air. What are the sources of these three pollutants?

How do the cardiovascular and respiratory systems work together?

Which organ does not play a role in mechanical or chemical digestion

Which statement is true of BOTH the sodium potassium pump (a type of active transport) and facilitated diffusion? Both involve proteins in the cell membrane. Both move materials from high concentration to low concentration. Both require ATP.

In active transport, View Available Hint (s) In active transport, molecules move across the plasma membrane by crossing the lipid bilayer directly, rather than by using a transport protein. no energy input is required from the cell.

A person feels tired, gains weight, and notices changes in metabolism. Which gland would be the cause A: the pancreas B: the testes C: the thyroid D: the ovary

What system that removes waste from the body and controls the body's water levels?

How is a scientific law formed?

Approximately, when was the structure of DNA first described? 1900 1950 1800 1850

What makes influenza viruses so dangerous

Blank investigations allow for the control of variables can be repeated