A student weighs a sample of sugar and records the measurement. He then writes down his observations on the appearance of the sugar, describing it as a white, crystalline solid. Explain why both of these pieces of information represent data that the student collected.

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".

it marks things for degradation via the proteasome. it alters there celluar location.