No humans fought back and live in America where they still hunted the animals
Bone Marrow is tissue in the hollow centers of our bones, it has stem cells which produce our blood cells. It also produces red blood cells that give oxygen to the whole body. Hope this helped : )
Nerve endings send information to nerves that run up the spine to the brain.
Two main functions of chloroplast is to store food and to make glucose(food) through photosynthesis.
Answer:
lowering the activation energy needed for the reaction to start
