Question

which of the following is correct about classifying organisms in science?

a. they are classified in a hierarchical system, with the largest group sharing only a few characteristics at the top, and the smallest group sharing the most characteristics at the bottom.

b. they are classified in a numerical system, where the top tier classifies organisms with the largest populations, and the lowest tier classifies organisms with the smallest populations.

c. they are classified in a chronological system, starting with the first organisms discovered by people and through to the most recently discovered organisms.

d. they are classified in a geographical system, where the organisms are listed alphabetically by country, and the countries are ordered by number of organisms they possess.

Explanation:

In biological classification (a subfield of Biology, under Natural Science), organisms are classified in a hierarchical system (like domain, kingdom, phylum, etc.). The top - level groups (e.g., kingdom) have organisms with few shared characteristics, and as we move down (e.g., species), the groups get smaller and organisms share more characteristics. Option B is wrong because classification isn't based on population size. Option C is wrong as it's not based on discovery time. Option D is wrong as classification isn't geographical in this way.

Answer:

A. They are classified in a hierarchical system, with the largest group sharing only a few characteristics at the top, and the smallest group sharing the most characteristics at the bottom.