He showed a powerful throw.

Conifers have the characteristic of not shedding their leaves even in winter.

The black locust tree blooms beautiful flowers in spring.

Lapsang souchong is a type of black tea characterized by its unique aroma.

This area is affected by radioactive fallout from past nuclear tests.

Alkenes, also known as olefin hydrocarbons, play an important role in organic chemistry.

Alkynes play a very important role in organic chemistry.

In chemistry class, I learned about alkanes.

Alkenes play a very important role in organic chemistry.

Chrysophyta perform photosynthesis underwater.