A, because it the constant variable
I believe this is T. Because i just learned that in science not that long ago, and deciduous forests have small winters and long growing seasons, and the small winters have lots of snow, and the long growing seasons have lots of rain.
A) results in haploid cells
By tar, I think you mean nicotine. (I Hope). It affects the nerve signals that regulate breathing.
<span>Epithelium made up of a single layer of flattened scalelike cells</span>
