The place where V. B.Ketkar served as a school teacher for 25 years is:

BAGALKOT was the place where V.B Ketkar served as a school teacher for 25 years old.

Explanation:

After accepting the teaching profession, he continued his service for 25 years at school in Bagalkot. Venkatesh Ketkar worked in various other schools till he retired in 1911.

the electromagnetic spectrum includes, from longest wavelength to shortest: radio waves, microwaves, infrared, optical, ultraviolet, x-rays, and gamma-rays.

the darker peppered moth species were favored due to the fact that the industrial revolution had made all the nearby trees a darker color instead of white.