Mendals experiments showed that: A.) Plants cannot be crossed with different plants.
B.) Pea plants are different from other plants.
C.) Plant characteristics are inherited
D.) Plant color is always a dominant trait.

Six amino acids have side chains that are polar but not charged. these are serine (ser), threonine (thr), cysteine (cys), asparagine (asn), glutamine (gln), and tyrosine (tyr). these amino acids are usually found at the surface of proteins, as discussed in the proteins 2 module.