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The increases in cell size and number that take place during life.

Also called gamma radiation. A form of electromagnetic radiation arising from the radioactive decay of atomic nuclei.

The increases in cell size and number that take place during life.

A huge collection of gas, dust, and billions of stars and their solar systems, all held together by gravity. Galaxies are found in a variety of sizes and shapes - spiral (like the Milky Way), elliptical, or irregular.

The increases in cell size and number that take place during life.

A very strong wind.

In genetics, a generation is a single stage of descent, from parent to offspring.

The increases in cell size and number that take place during life.

The ridges on the brain’s outer surface. Plural is gyri.

The earth’s lower atmosphere becomes thick with gases which trap the suns radiation making the earth warmer.