Remember that Convection is a type of heat transfer. Convection also occurs in the mantle. Describe where the heat is coming from and how this heat affects the movement of Earth’s mantle and Earth’s crust.

the solute can move "downhill," from regions of higher to lower concentration, relying on the specificity of the protein carrier to pass through the membrane. this process is called passive transport or facilitated diffusion, and does not require energy.

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

answer: b

coz red blood cells marrow and circulates the body for 120 days.