The process of excreting waste products from the body, particularly in the form of undigested food.

The waste products that are excreted from the body after digestion, including feces and other undigested materials.

The process of eliminating undigested food or waste from the body, particularly through defecation.

Abbreviation for epidermal growth factor, a protein that stimulates cell growth, proliferation, and differentiation.

The reproductive cell produced by females of many species, typically fertilized by sperm to form a zygote.

Relating to the ecological niche or habitat of a particular organism, often describing the living conditions and environment.

A form of reproductive isolation where two species are unable to interbreed due to differences in their habitats or ecological preferences.

The role and position of an organism within its environment, including how it obtains resources and interacts with other organisms.

A population of organisms that is genetically distinct and adapted to a specific ecological niche, often within a larger species.

A scientist who studies the relationships between organisms and their environments.