Carboxyl groups have an electronegative oxygen atom double bonded to a carbon atom. This carbon-oxygen bond is very polar and the fact that its a double bond increases the polarity of the bond.
PEA agar, also referred to as Phenylethyl Alcohol Agar is a medium  used by microbiologists to grow microorganisms. The ingredient that  supplies nitrogen is casein. Making the world better, one answer at a time.
Noun. 1. pea pod-husk of a pea; edible in some garden peas. peasecod. pea-the fruit or seed of a pea plant.cod, pod, seedcase-the vessel that contains the seeds of a plant (not the seeds themselves).oun. 1. pea pod-husk of a pea; edible in some garden peas. peasecod. pea-the fruit or seed of a pea plant.