A sample of cells was sent to a lab. The lab technician measured a chemical that the cell produced that caused the other cells around it to divide uncontrollably. What disease do the cellular secretions most likely indicate? cancer
tuberculosis
sickle cell disease
diabetes mellitus

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".

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.