A full sized cow needs about 100 square feet of pasture to graze on each day. Assume an average sized classroom is about 600 square feet. How many classrooms worth of pasture would be needed to keep a cow alive for a year?

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.

one part of the electromagnetic spectrum that arrives on earth as solar radiation from the sun is the visible spectrum. wavelengths of the visible spectrum combine to form what we refer to as

answer - d) ultraviolet radiation.

violet /   380–450 nm / 668–789 thz

violet is number 1 in the chart of visible light.