All modern primates, including humans, are descendants of the earliest primates.
Benthos describe organisms that live on or in the ocean floor.
The term "lipid" does not specify a particular chemical structure. Whereas one can write a general formula for an amino acid, nucleic acid, or protein, lipids are much more chemically diverse. Compounds are categorized as lipids based on their greater solubility in organic solvents than in water.
