What of the following IS NOT a major organ of the respiratory system? trachea
bronchioles
alveoli
lymph nodes

As a small change in a person's dna can cause a genetic disorder

In the ocean why are the greatest amount of primary producers found in the epipelagic zone and how does that affect biodiversity

Rarefaction is used for which of the following? a. creating a representative sample b. studying how disease impacts populations c. rediscovering species thought to be instinct d. determining which sea creatures live in an area