Nitrogen oxide is a

A. primary pollutant

B. secondary pollutant

C. quaternary pollutant

D. tertiary pollutant

What differentiates anthropocentric and biocentric views of the environment?

How do bats navigate to find prey

What is universal about the DNA from human and yeast?

Organisms that grow on energy released by chemical reactions of inorganic substances are A. multicellular. B. heterotrophs. C. chemoautotrophs.

What is the purpose of a scientific classification system?

The skin is the primary organ of the

What is true for urochordates? A. The notochord is present throughout their lives. B. The notochord is present only in the larval stage; it is absent in adults. C. The notochord is present in the larval stage; it becomes vertebrae in adults.

What term is used to refer to a characteristic of a population in statistics?

Which mechanism of ion uptake would best enable a plant to produce a steady supply of chlorophyll?

Why do farmers sometimes use more wasteful methods of irrigation than are available?