Could u possibly give me any options or is it opionon based. let me know ill answer it in a jiffy:)
You would be a specialist at the ecosystem level of biology.
The ecosystem has to do with a community consisting of organisms who interact with each other and with their surroundings. So, if this scientists wants to see which species of frogs would win, he would have to observe them at the level of the ecosystem to see their interactions within their community.
Answer:

Explanation:
As you should know, in the previous question, Anaphase comes AFTER Metaphase, not "before".
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I believe it would be Bone Tissue and Connective Tissue
A specific organ on which a hormone, drug, or other substance acts