1. Use of false feet
This is seen in amoeba, also known as the pseudopodia.
2. Cilia
Example - paramecium
3.Flagellum
example- animal cell
The brain region identified lighting up during an fMRI scan in a patient with obsessive-compulsive disorder is the anterior cingulate cortex. The anterior cingulate cortex is part of the limbic system and is responsible for the emotion formation, memory, processing, compulsions and obsessions, and others.
The number of organsims at each levels, so there are more producer than herbivores, more herbivores than carnivores and so on...