Match each phylum or class to its correct characteristic.

mammals
rotifera
cnidaria
mollusca
nematocyst
arrowright
radula
arrowright
mammary glands
arrowright
cilia in circular arrangement
arrowright

Answer is:

1) mammals - mammary glands.

2) Rotifera - cilia in circular arrangement.

3) Cnidaria - nematocyst.

4) Mollusca - radula.

Mollusca is a large phylum of invertebrate animals.

Cnidaria are mostly marine animals.

Rotifera are phylum of microscopic pseudocoelomate animals.

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