Answer:
A tree and grass only produce oxygen, while a bird, a deer, and butterfly only produce carbon dioxide.
Explanation:
untreated high blood pressure, history of aneurysms in family, arteriovenous malformations (tangles of arteries and veins that disrupt bloodflow, and cigarette useage.
Answer:
convert CO2 into sugar which is converted into glucose
Explanation:
Answer:
removal of aged and damaged red blood cells from the blood
Explanation:
This began like about 65 million years ago