How are directional selection and disruptive selection similar? how are they different?

The similarity between directional and disruptive is that both are types of selection on polygenic traits in which the curve shift away from the middle. 

The different between disruptive and directional is in disruptive move toward both ends . And in directional, the curve shift toward one end.

Only algae, oak trees, and bermuda grass produce atp by photosynthesis i am almost positive

Ithink the dna sequences may vary but the amino acid sequences are identical.