Chapter 18, Problem 8STP

Summary Introduction

Introduction:

Classification has several systems, out of which the three-domain system is one. The three-domain system was proposed by Carl Woese and is based on the studies of comparison of rRNA in organisms. Ribosomal RNA or rRNA is a key component of ribosomes and is highly conserved as the rate of mutation is low. Using this system, all organisms were classified as Archaea, Bacteria, and Eukarya of which Eukarya is made of 4 kingdoms which include Protista, Fungi, Plantae, and Animalia.

Answer to Problem 8STP

Option (B).

Explanation of Solution

Explanation for correct answer:

Option (B) domain. The domain is the largest of all the classification. As we move for further classification, the information is more descriptive and accurate, not generalized. Hence, the correct answer is option (B).

Explanation for incorrect answer:

Option (A) class. The class is more descriptive and specific as compared to phylum, kingdom, and domain. Hence, this is an incorrect answer.

Option (C) family. The family is more descriptive and specific as compared to class, phylum, kingdom, and domain. Hence, this is an incorrect answer.

Option (D) phylum. The phylum is more descriptive and specific as compared to kingdom, and domain. So, this is an incorrect answer.