Answer:
The answer is A
By the late 1830s, botanist Matthias Schleiden and zoologist Theodor Schwann were studying tissues and proposed the unified cell theory. The unified cell theory states that: all living things are composed of one or more cells; the cell is the basic unit of life; and new cells arise from existing cells.
Answer:
How hard the blood pushes on the inside of the blood vessels is called Blood Pressure
The total amount of blood the heart pumps in one minute is called Cardiac Output
When blood vessels open wider during exercise, they are said to dilate
How many times your heart beats in one minute is called Heart Rate
The force that can put unhealthy tension on the heart as it is pumping is called Blood pressure
The amount of blood the heart pumps out in one beat is called Stroke volume.
Explanation:
All this concepts to the heart and cardiovascular system. It is important to know how heart is functioning to see how blood circulates.
The answer to your question is,
Seafloor spreading
-Mabel <3
RNA. RNA is ribonucleic acid.
B . Excessive commercial fishing
Reason: the other options are good things this is the only bad thing
