When a Species Has Disappeared from the Earth, It Is

question 19

True/False

When a species has disappeared from the Earth, it is biologically extinct.

---

Definitions:

Lacrimal Puncta

Small openings on the inner sides of the eyelids that drain tears into the lacrimal ducts.

Lacrimal Apparatus

A system consisting of structures involved in the production and drainage of tears, maintaining eye health.

Nasolacrimal Duct

A duct that allows tears to drain from the eye into the nasal cavity.

Aqueous Humor

A clear, watery fluid that fills the space in the front part of the eye between the lens and the cornea.