Answer:
Blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium.
Explanation:
They start as single cell orginisms then they evolve from there.
hope that helps
Answer:
C
Explanation:
The nucleus contains most of the dna and the mitochondria contains a small amount
C. hemoglobin hope this helps
Answer:
c. mitochondrion, virus, hemoglobin, glucose, water molecule
Explanation:
The mitochondrion is a membrane which is found in cytoplasm of eukaryotic cells. It is also known as power house of cells. This is largest from virus, hemoglobin, water molecule and glucose.
Virus is second largest and is small infectious agent. It has capability to infect many organisms and living cells. Hemoglobin is protein which is present in red blood cells. Glucose is a type of sugar presence in the blood. Water molecule is composed of hydrogen and oxygen and is smallest among the others.