1. What do the arrows in a food chain or food web represent?

Which of the dna typing techniques do you think you would choose if you had to analyze a dna sample? why?

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

What is a metal replacement reaction