Only 1- the experiment can not show a cause and effect relationship if there are more than one factors contributing to the outcome.
Answer:
first question: 3. osmosis is a kind of diffusion that involves the movement of water
2nd question: 1. it allows carbon dioxide to move in and out of the cell
Explanation:
<span>The energy from the sun is absorbed by the chlorophyll of plants leafs and then is converted in glucose by a process called photosynthesis. After we eat and digest plants, glucose in our blood is transported through all muscles.</span>
Exhaled air has more carbon dioxide because the blood contains some carbon dioxide (a waste product) that is transferred to the air in the lungs, which is then exhaled. The result is that the exhaled air contains less oxygen and more carbon dioxide than the inhaled air. The air in the lungs also becomes humidified with water before it is exhaled.
