Which best explains why a person can tell the difference between a whisper and a yell? a Sound waves turn into chemical signals that indicate certain sounds.
b Different vibrations in the ear cause the brain to interpret different sounds.
c The fluid in the cochlea picks up electrical signals for the intensity of sound.
d The eyes see what is making the noise and help the brain process the sound.

25) a student takes four samples of a white crystalline solid and places each in a well plate. on top of each sample, she carefully places 20 drops of clear mystery liquids a, b, c and d. her results for each well are: liquid a: the solid dissolves quickly. liquid b: the solid appears unchanged. liquid c: a brownish colored liquid is produced. liquid d: fizzing occurs and the well becomes warmer. in which well does a physical change occur?

Use the drop down menus to match each example to the fossil topic discussed then to show how the fossil record gives evidence of evolution

You arrive late to a biological seminar. however, just as you enter the room, you hear the speaker referring to the "five-prime end" and the "three-prime end" of a macromolecule. immediately, you know that they are talking about a: ]