Answer:
Global warming is the change in the climate of the earth causing it to heat up whereas the greenhouse effect is a naturally occurring phenomena, constantly occurring due to the atmosphere and sunlight.
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.