Amino acid is to protien as? 1) fat is to lipid
2) dna is to rna
3)sugar is to fat
4) simple sugar is to starch

Working with si (metric) units for each of the following commonly used measurements, indicate its symbol. liter gram milliliter kilogram meter centigram milligram centimeter kilometer second millimeter milliseconds

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

Ineed to find the answer of this question because i dont understand it