What are the two major steps in biological classification?

There are four half-steps in a major 3rd.

Fiction & Nonfiction.

Vertebrates and invertebrates.

Flowering and foliage.

There are two. Contact Froces and Action-at-a-distance Forces.

biological science and applied science

the two major branches of science are biological science and natural science. these two are divided into many branches.

Factual books and fictional books.

There are five whole steps (tones) and two half steps (semitones) in any major/ionian scale. In C major the half steps lie between E-F and B-C (these are the two places where there are two white keys adjacent to one another - without a black note in between).

the Triassic and Jurassic periods.

A scientific name consists of a genus and a specific epithet, meaning the organisms genus and species classification.

Two: the half steps (semitones) in a major scale occur between the 3rd and 4th notes and the 7th and 8th notes. The remainder are whole steps (tones).

Human kind is a major threat even to its selfand the enviroment , and nbc(nuclear biological chemical)

Gender is a classification by the sexual characteristics of people. There are two biological genders: male and female (men and women)

The two major classification schemes used in the United States are the Dewey Decimal Classification System, used in most public libraries; and the Library of Congress Classification, used in most academic libraries.