Photosynthesis: what is in a leaf ?

Hemoglobin is a proton that carries oxygen around your body what is hemoglobin made from

Internal feedback works to maintain homeostasis when your a. heart rate decreases as your white blood cells increase b. breathing rate decreases as your red blood cells decrease c. heart rate increases as your liver is cleaning blood d. breathing rate increases as your heart rate increases

What methods do scientists use to predict volcanic eruptions? select all that apply