Gene mutations can best be described as changes in the

The distant ancestors of tigers may have had bodies without stripes. use the theory of natural selection to explain how tigers may have evolved to have stripes.

An uncomfortable feeling in the ears when descending in an airplane is caused by changes in air pressure on the: a. inner ear b. middle ear c. eardrum d. hammer/anvil

When a chemical spill has occurred on your clothes you should 1. scream for 2. run under the shower and turn it on 3. use the eye wash station 4. grab the first aid kit