The reproductive organs, such as the ovaries in females and testes in males, that produce gametes and sex hormones.

An ancient supercontinent that included parts of the present-day southern continents (Africa, South America, Australia, Antarctica, and India).

A genus of green algae consisting of a colony of cells that work together to perform photosynthesis.

A species with distinct male and female individuals, where each organism is typically one sex or the other.

Relating to the formation and development of gonads or gametes.

A sexually transmitted infection caused by the bacterium Neisseria gonorrhoeae, affecting mucous membranes and causing inflammation.

The structure in certain animals that contains the gonads (reproductive organs), specifically in arthropods.

An order of corals that includes the horny or soft corals, often characterized by their branching forms.

A level of organization or complexity within a taxonomic group, often used to categorize organisms with similar characteristics.

A theory of evolution that suggests changes in species occur slowly and steadily over long periods of time.