D. all of the above
as they are all, evergreen, short and contain flammable oils
Having more then one independent variable will give unreliable results. Hope this helps
Mumbling- slurring words together at a very low level of volume and pitch so that they are barely audible.
Cells are limited in size because the outside also known as the plasma membrane must transport food and oxygen to the inside of the cell. This can be represented by what is known as the surface to volume ratio.
X-rays are the radiation that allows us to see through the skin to visualize bones