True. Common descent, at least, is a VERY controversial topic. Common Descent states that every species should have evolved from ONE SINGLE SPECIES (crazy, I know.)
6. A because carbs provide 50% energy and lipids 20% (rest from protein)
7. A e.g. Muscle cell for movement and blood cell for oxygen transport
8. C
A because carbon cause global warming and air pollution it's not helping the ecosystem
