They have different types of gills and they have different legs.
Prawns have branching gills, shrimp have plate-like gills.
Prawns have claws on 3 pairs of legs, shrimp have claws on 2 pairs of legs.
They are only the "same" in that people use the terms shrimp and prawn to refer to either. American English speakers tend to use the word shrimp and British English speakers tend to use the word prawn to refer to both shrimp and prawns.
But scientifically, as the quiz asks, there is a difference.
According to the crustacean taxonomist Tin-Yam Chan, "The terms shrimp and prawn have no definite reference to any known taxonomic groups. Although the term shrimp is sometimes applied to smaller species, while prawn is more often used for larger forms, there is no clear distinction between both terms and their usage is often confused or even reverse in different countries or regions."
But since you cite it (without a link), here's a wikipedia article that says they are different, but similar.
And note, there is a distinction between their zoological classification and the words people use in everyday language and to refer to them as food.
Most of the articles I see talk about the colloquial meaning of the words and aren't written by biologists.
The question asks for a "scientific" difference, not a difference invented by people in the fishing or culinary industry in recent years.
where they identify specific species of fresh water prawns and marine shrimp. I believe the prawns are also identified as Macrobrachium rosenbergii, so I guess the scientific community has some basic rules about what makes a prawn and what makes a shrimp. I suppose this isn’t a taxonomy article, but I think the best conclusion is that the common usage has very little to do with scientific distinctions between these organisms. The “true shrimp”, AKA Caridea suborder, and Macrobrachium rosenbergii, or the commercial freshwater prawn, are definitely different.
"Definition of meerkat: any of several African mongooses especially : a burrowing highly social primarily insectivorous mammal (Suricata suricatta) of southern Africa that is chiefly grayish with faint black markings and lives in usually large colonies."
"The lifespan of wild rabbits is much shorter; the average longevity of an eastern cottontail, for instance, is less than one year."
In any case, that is not what the question asks. The question asks for maximum lifespan. The record for the oldest rabbit is 18 years. For crows, the record is 59 years.
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