Examlex
Apoptosis begins with a cell's receiving a signal to die.
Behavior
The actions or reactions of an organism or system, often in response to external stimuli, encompassing a wide range of activities and responses.
Survival of the Fittest
A concept in natural selection suggesting that individuals or species that are most adaptable to their environment have a better chance of surviving and reproducing.
Charles Darwin
A 19th-century English naturalist, geologist, and biologist best known for his contributions to the science of evolution by natural selection.
Species
A group of living organisms consisting of similar individuals capable of exchanging genes or interbreeding, forming the principal natural taxonomic unit below a genus.
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