A modification in an organism or its parts that makes it more fit for existence under the conditions of its environment.

A situation in which a species is at risk of extinction due to habitat loss, hunting, or environmental changes.

The property of making something visible by emitting light of its own.

The scientific process of testing hypotheses through controlled observations and manipulations.

The process of escaping from confinement or danger.

A characteristic of certain substances that can cause harm or illness when ingested or absorbed.

The decrease in weight or buoyancy of an object that allows it to rise or rest on the surface of a fluid.

The process by which living organisms take in and utilize life-sustaining gases from the air or water.

The attractive force that pulls two bodies toward each other, proportional to their masses and inversely proportional to the square of the distance between them.

An action or technique used to attract or entice an animal, often for the purpose of capturing it.

Referring to a living being or organism, often implying a degree of complexity or biological function.

Made or produced by humans rather than occurring naturally, often referring to synthetic materials or processes.

Having a great distance from the surface of the Earth or from the sea; often used to describe bodies of water or atmospheric conditions.

The act of sharing information or ideas through verbal or non-verbal means.

The region beyond Earth's atmosphere that contains the stars, planets, and other celestial bodies.

A term that describes populations vulnerable to extinction, often due to habitat destruction, hunting, or climate change.

A condition in which an organism has adapted to its environment, often involving structural or functional changes for better survival.

The phenomenon where certain substances emit light when they are excited, usually in darkness, creating a visible luminescence.

The force that attracts objects with mass toward one another, particularly the attraction that gives weight to physical objects.