9. If an amino acid substitution occurred in a polypeptide chain, predict which option would have the most significant
impact on the structure and function of the final protein? Why?
a. Serine is replaced by glutamate
b. Alanine is replaced by lysine
c. Glycine is replaced by valine

The table shows dates and appearance of index fossils. which rock layers can be dated most precisely? a) a layer containing both a fossil 4 and a fossil 3 b) a layer containing both a fossil 2 and a fossil 3 c) a layer containing both a fossil 1 and a fossil 4 d) a layer containing both a fossil 1 and a fossil 2

4. if a cell is placed inside a solution that has a higher concentration of solute than on the inside of the cell, what can be said about the movement of water? a. water will move out of the cell, causing it to shrivel. b. water will move in and out of the cell at the same rate. c. water will move out of the cell, causing it to swell. d. water will move into the cell, causing it to swell.

Which anatomical plane is the only one that could not show both the sternal region and vertebral region