Answer:
B
Explanation:
Chemistry starts with the atom as this is the building block of all chemistry.
The cell, nucleus, and enzyme are all part of biology and not chemistry (at this level at least)
DNA needs to replicate before cells divide to give the complete set of genetic instructions to its daughter cells, (or ensures that each new cell inherits all of the genetic traits of the parent cell).
Hope this helps! :D
~PutarPotato
Answer:
Explanation: In facilitated diffusion, molecules diffuse across the plasma membrane with assistance from membrane proteins, such as channels and carriers. A concentration gradient exists for these molecules, so they have the potential to diffuse into or out of, the cell by moving down it.
Landfill waste results in air pollution as A) garbage decomposes and releases methane. When "biodegradable" products such as food or paper waste begin to decompose they release methane into the atmosphere which is a pollutant and also a major greenhouse gas. This is an unintended side affect of using certain products that are believed to be environmentally friendly.
