Question

Refer to this portion of a dichotomous key to answer the question.

1. (a) Has a single dorsal fin ® 5 (b) Has a double dorsal fin ® 2

5. (a) Has a small fin on back near tail ® 6 (b) Has no fin on back near tail ® 7 6. (

a) Has barbs near the mouth ® Catfish (b) Does not have barbs near the mouth ® 10

7. (a) Tail is asymmetrical ® Sturgeon (b) Tail is symmetrical ® 8


What would the result be when identifying a fish with a single dorsal fin, no fin on its back near the tail, and a tail that is asymmetrical?

Answer 1

From the dichotomous key, the result would be STURGEON FISH.
The sturgeon fish, according to the dichotomous key, has a single dorsal fin, has no fin on its back near the tail and it has a tail that is asymmetrical.
A dichotomous tree is a tool which is used to identify animals. It is made up of a series of choices which lead the user to the correct animal.