Molecules are defined as the smallest particles of a chemical compound or an element, and are made up of atoms. Cells are made up of semi permiable membranes that only allow selected materials to move in or out of the cell, therefore due to the big size of molecules compared to atoms the membrane doesn't allow their passage in the cell. Therefore the cell doesn't allow most molecules to diffuse passively to the cell. Secondly, molecules that can enter the cell requires specific carriers carriers that will enable entry of small molecules in the cell.
The components that make up the cardiovascular system are....
The Heart.
The Arteries.
The Veins.
The Capillaries.
<em>Hope this helps</em>
Answer:
✨Chemicals in the air create too much oxygen.✨
Explanation:
✨ plant-like algae bloom in polluted waters and create oxygen-depleted dead zones.✨
✨Water pollution that alters a plant’s surrounding pH level, such as acid rain, can harm or kill the plant. Acid rain forms because of atmospheric sulfur dioxide and nitrogen dioxide, which are emitted from natural and human-made sources. These include volcanic activity and burning fossil fuels.✨
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