Answer:
Cell
Explanation:
I'm not 100% what you mean by "building block", but because your subject is biology, I will assume that you mean a cell.
In general, a cell is considered the "building block" of life because everything that is alive is made up of cells.
Hope I helped :)
The location within the enzyme where the substrate binds is called the enzyme's active site. The active site is where the “action” happens, so to speak. Since enzymes are proteins, there is a unique combination of amino acid residues (also called side chains, or R groups) within the active site
Answer:
D
Explanation:
The Moon stays in orbit around the Earth because the Earth's gravity keeps the Moon orbiting us. The gravity makes the Moon accelerate all the time, even it's speed remains constant.
The Changing Carbon Cycle. ... Most of the carbon in the atmosphere is in molecules of carbon dioxide (CO2). Carbon dioxide is a greenhouse gas; it causes heat to be retained in the atmosphere. By increasing the amount of this greenhouse gas in the atmosphere, Earth is becoming warmer.