The core of a star must be at temperature of degrees celsius for hydrogen fusion to take place.

Which best describes red blood cells? a. they are colorless b. they protect against disease-carrying microorganisms c. they transport oxygen throughout the body d. they aid in blood clotting

Which element forms the basis of all organic organisms a carbon b oxygen c hydrogen d nitrogen

Cassandra made a venn diagram to compare and contrast the two stages of cellular respiration. which belongs in the area marked x? energy is released. oxygen is used up. glucose is broken down. carbon dioxide is used up.