Why do i eat? and why does animals eat?

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

The basic kind of life cycle found in the simplest animals is: haplontic or diplontic

Which of the following would you not find in a bacterial cell? dna cell membrane golgi apparatus ribosomes