The answer to the question "When a part rusts is becomes heavier or lighter?" is the rust actually has a tendency to flake off. But as long as the rust is still on the nail, the nail will be heavier. The reason is that you are actually adding an oxygen and hydrogen to the nail.
Answer:
The answer is option D.
it divides one diploid cell into four haploid cells
Hope this helps you
The answer is; C
Ozone is a layer in the stratosphere that absorbs UV light from the sun and protects life on earth. UV can cause damage to the genetic material of cells. The other is greenhouse gases that trap infrared heat within the lower atmosphere and cause global warming of the planet.
The pumping force of the ventricles moves blood through the arteries. The breathing movements exerts pressure on the chest veins, the valves in the larger veins keep the blood from flowing backwards, and the skeletal muscles' contraction all help the blood in veins to move.
