The basic unit of structure and function in all living things.

Made of one cell and is an entire organism.

Made of two or more cells to create an entire organism.

A system of organization that begins with the simplest level and each level  becomes more complex.

The process by which cells become different types of cells.

A group of similar cells that work together to carry out specific tasks.

A group of different tissues working together to perform a particular job.

A group of different organs that work together and perform a specific task.

Something that has or once had all the characteristics of life - it has interrelated systems to help it react to stimuli, reproduce, grow, adapt, and maintain homeostasis.

The process by which new organisms are produced.

The new organisms produced through reproduction.

A type of reproduction in which only one parent organism or part of that organism  produces a new organism.

A specific characteristic that an organism can pass to its offspring through genetic material during reproduction.

All the organisms of the same species that live in the same area at the same time.

Refers to the variations of traits in a population.

A type of reproduction where the genetic materials from two different cells combine, producing an offspring with a blend of their parent’s traits.

Female sex cell.

Male sex cell.

The joining of an egg with sperm.

A fertilized egg.

A slight difference in an inherited trait among individual members of a species.

A group of organisms that can have fertile offspring.

The process by which organisms with variations that help them survive in their environment live longer, compete better, and reproduce more than those that do not have the variations.

The selection and breeding of organisms for desired traits (traits humans find useful or attractive).