Questions about example sentences with, and the definition and usage of "Biology"

A: 生物学は我々の世界を説明していて、最大級の成功を収めたした自然科学の一つである。

A: Common expressions:
Biology, biological, biologically.

Example sentences:
I am learning Biology in school.
The doctor says I have a biological condition.

A: It doesn't really sound natural to say "student of biology".

A: Biology is the study of living things and what makes them up and geology is the study of rocks and minerals

A: jeevshastra kya hai?

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A: "I can focus more on Biology" sounds more natural

A: "Biology is interesting to me but it can be very difficult." or "I think Biology is interesting but it can be very difficult."

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A: Yes.

"Our species is Homo sapiens."

"The finch species of the Galápagos Islands are famous thanks to Darwin's work."

You conjugate the verb based on whether species is used as a singular or plural even though it looks exactly the same in both cases.