Answer:
A
Explanation:
Cardiovascular diseases involves the heart.
Any of the above options with regards to blood (etc, white blood cells, red blood cells) are related to circulatory system, not affecting the function of the heart.
Stem cells performing apoptosis to remove old cells is a myth. Stem cells can only differentiate to form cells of the same lineage, not causing other cells to undergo apoptosis. The only external factor that can cause cells to undergo apoptosis is a type lymphocyte in the immune system
Answer:
mechanical weathering:
ice wedging: does not change rocks composition: abrasion
chemical weathering:
oxidation: changes rocks composition: acid rain
Congress wanted to raise money for the treasury because the needed to pay off war debts.
No. The first multicellular organisms appeared during the P<span>aleozoic era.</span>
The answer is 1. Does the amount of sunlight in a day