Barnacles are crustaceans, and therefore more closely related to crabs than to mollusks like limpets. The apparent similar morphology of barnacles and limpets is a result of convergent evolution. It does not necessarily require DNA (i.e., similar genotype) in order to produce similar phenotype (physical characteristics).
Since crabs and barnacles belong to the same evolutionary lineage, one would expect their DNA to be more similar. However, convergent evolution could result in homoplasies that would cause a barnacle to have DNA more similar to that of a limpet than a crab.
Barnacles and Crabs are both Crustaceans, while limpets are Molluscs - so I would assume that a barnacle's DNA would be more similar to a crab's.
sea urchins, sea stars, sea anemones, octopus, mussels, chiton, hermit crab,c oralline algae, limpet, shore crab, turban snail and barnacles.
explain how a fusion reactor would be similar to a fission reaction
they die
They would stay on the whales
The answer is Benthos, Nekton would mean it's free swimming like a fish.
compare-and-contrast-essay
Compare-and-contrast essay
It would be a toss-up among sea squirts, oysters, barnacles, sponges and members of congress.
You need to compare and contrast the items you mentioned.
how would you explain the phrase:"love of country"