'Animalus Anthropomorphicus' refers to the tendency that people have to pretend that animals are very similar to humans. It is dangerous because they cause people to ignore the risks that come from interacting with animals.
The nitrogen cycle could not exist without bacteria. Bacteria that lived inside the ground, catch the ntirogen that has been fixed and convert it into nitrate. This nitrate than used as a nutrients during photosynthesis from which the plants produce another fixed nitrogen and completed the cycle.
Cellulose, that is the molecule that makes a tree sturdy.
