The egret, am insect eating bird, grazing near the mouth of a herbivore. Mutualism, commensalism, parasitism?

Commensalism.

Explanation:

It is commensalism because commensalism is a relationship that exist between two organisms in which one organism benefit and the other organism neither benefit and it is not harmed.

The egret obtain accomodation and feed on flying insects at the mouth of the herbivore and the herbivore dies not benefit anything or not harmed. The herbivore us not harmed by the presence of the insects.

hydroxyl -oh

alcohols, always polar, can form hydrogen bonds with h2o molecules

carboxyl -cooh  

cargoxylic acids, has acidic properties which is a source of hydrogen ions, found in cells in ionized for with a charge of oh-1

carbonyl > co

ketone if within skeleton, aldehyde if group is at the end of skeleton, k & a may be structural isomers, it determines 2 sugars (ketose & aldose)

amino -nh2

amines, acts as a base, it can pick up h+ ions from surrounding solution, ionized with charge of 1+

methyl ch2

addition to rna/dna affects and gene expression

phosphate -opo3 ²⁻

organic phosphates, contributes to negative charge to, molecule that it is a part of, and potential to react with h20

sulfhydryl -sh

thiols, cross-linking stabilize the protein, and it is structure