Papers are due on the front desk by the end of the scheduled class time today. None will be accepted late. The grading scale will probably be posted in 2-3 days. Penicillin kills bacteria by interfering with the formation of their surrounding cell walls. The polysaccharide and polymer of glucose used by many animals to bank their surplus chemical energy for short periods of time is glycogen.
Some animals can digest cellulose.
One big strength of science is that one scientist's results are cross-checked by other scientists. Testimonial, assumptions, intuition, faith and rationale are five of the ways.