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Unit 1 Life Over Time

Across
A change in genetic material.
A membrane-covered structure that contains all of the materials necessary for life.
Naturally occurring differences within a species.
When a single parent produces offspring that are identical to the parent.
A system that classifies by ranking.
A group of organisms that are very closely related.
The practice by which humans select plants or animals for breeding bases on desired traits.
Uses a series of paired statements to identify organisms.
The remains or imprints of once-living things.
Down
Refers to the process by which populations change over time.
The science of describing, classifying, and naming living things.
The process by which organisms that inherit advantageous traits tend to reproduce more successfully than other organisms do.
A type of branching diagram that shows relationships among organisms.
An inherited trait that helps an organism survive and reproduce in its environment.
The maintenance of a stable internal environment.
When two parents produce offspring that share the characteristics of both parents.
When all members of a species have died.
Represents the largest differences among living organisms.
The genetic material that controls the structure and function of cells.
A change that affects the activity of an organism.