A biologist believes that two organisms are of the same species, even though they look different from one another. What would cause the biologist to come to this conclusion?

The correct answer would be - they can mate or reproduce and produce fertile offspring.

Explanation:

In the biological world, there can be certain species the might have different looking organism due to environmental condition such as weather, geographical change, and many more.

In such a case, The biological species concept help in determining if these organisms belong to the same species or not. According to this concept, different species are separated by pre and post-zygotic barriers and due to this they can not mate, or even if they mate there would be no fertile offspring.

thats not even an aswer choice