Question

Certain fishes, such as lungfishes, further adapted themselves to the terrestrial mode of life and evolved into today's amphibians. Which evolutionary mechanism is represented by this example?Select one of the options below as your answer: A. Convergent evolution B. Adaptive radiation C. Sympatric evolution

Answer 1

C.

Answer 2

C - this is the evolution of new species from an ancestor in an ecological niche. The lungfish have the niche of living both in and out of water and so this niche is available to them, gradually evolving into amphibians.

For completeness: A describes when two or more different species undergo evolution seperately and end up at the same result for a trait. B - descibes when minor changes occur from a species such as the classic beak diversity found on the birds of the Galapagos islands by Darwin

Answer 3

A. the question says it...many different fishes evolved into amphibians, therefore they converged. different species into one group

Answer 4

The answer is B. It is not C because sympatric evolution simply refers to evolution within the same geographical area. The question deals more with the adaptation of fish for life in water and on land. And then their radiation on land and in water to make todays amphibians.

Answer 5

Adaptive radiation refers to the Darwinian finches, where a species will adapt to fit it's environment. like with the finches, if a type of finch moves from island a to island b, and needs to eat a different type of food or serve in a different niche, it will adapt to that niche.

Answer 6

Definitely B!!!!!
A. Convergent evolution refers to things like birds, bats, and butterflies all evolving wings to fly, even though they do not have a common winged ancestor... they developed the same or similar structure in a separate evolutionary pathway to perform a similar function.
B. Adaptive radiation means that they adapted different characteristics in order to radiate or spread to a new ecological niche or geographical area. This is what you're talking about with fish evolving into amphibians because at that time there were no vertebrates that were able to live on land.
C. Sympatric evolution refers to a new species arising because some of the members of a population are reproductively isolated from one another but they still live in the same geographic area. So that's not what you're talking about here either.

It's B!

Answer 7

the answer is most definitely b