controll is your awser you vary a factor to measure the results
Answer:
✏ Arteries are the vessels that carry blood away from the heart to various organs of the body.Since, the blood emerges from the heart under high pressure, the arteries have thick, elastic walls.
I think the first one is the the forest industries keeps changing, so that is why the economics delayed the scientists.
The statement about boiling points that is true is the boiling point of a substance is higher than its freezing point.
If something boils, it means it is really hot in there, and if it freezes, it is very cold.
The flow of energy through a food chain and is the focus of study in ecological energetics In an ecosystem ecologists seek to quantify the relative importance of different component species and feeding relationships
