Natural Experiments Are ______ Experiments That People Did Not Intentionally

question 18

Short Answer

Natural experiments are ______ experiments that people did not intentionally plan as an experiment.

---

Definitions:

Holothuroidea

A class of marine invertebrates within the phylum Echinodermata, commonly known as sea cucumbers.

Endoskeleton

An internal support structure of an organism, typical of vertebrates, providing physical support and protection for the body.

Urochordates

A subphylum of chordates; includes the tunicates.

Vertebrates

Animals that possess a backbone or spinal column, including fishes, amphibians, reptiles, birds, and mammals.