Alkenes play an important role in organic chemistry.

Alkenes play an important role in organic chemistry.

Alkanes are basic components of organic chemistry.

He is studying the history of African Americans.

The parasympathetic nervous system helps our body to relax and conserve energy.

Linear programming is a part of operations research and is used to find the optimal solution.

Despite their simple body structure, nematodes have surprisingly complex ecosystems.

Neurotransmitters play a crucial role in transmitting information in the brain.

He damaged his motor nerves in an accident.

He received a heavy penalty for that crime.