Which statement describes what occurs in both animal and plant cells?
a) nitrogen is used for respiration and oxygen is a waste product.
b) oxygen is used for respiration and carbon dioxide is a waste product.
c) nitrogen is used for respiration and carbon dioxide is a waste product.
d) carbon dioxide is needed for respiration and oxygen is a waste product.

your body is trying to warm itself up. or more precisely, sensors in your skin send messages to your brain to generate heat to your body.

ionic bonds are two oppositely charged ions that attract. a sodium ion has a 1 positive charge; a chloride ion has a 1 negative charge. sodium and chloride have oppostive charged ions that attract which forms an ionic bond. a chemical bond formed when two atoms share electrons is called