Answer:
B: decayed plants and animals.
Answer:
Non polar molecule, small
Explanation:
Cell membrane is a selectively permeable membrane.
Factors that affect permeability of a molecule are-
A. Size - Small molecules can easily pass through the membrane than the large molecules.
B. Solubility - Non polar molecules ( eg. carbon dioxide) are lipid soluble in cell membrane , so they can easily pass through the membrane than the polar molecules (eg. glucose)
An amino acid is a molecule that contains two functional groups , an amine<span> and a</span>carboxylic acid<span> , as shown in Figure 1. In this illustration there is an additional group called the side chain, designated with an R. The variation seen in naturally occurring amino acids arises from differences in this side chain.</span>