Question

Which of the following is the best summary of the passage?

A. Eukaryotes and prokaryotes are different. One has a nucleus with a cell membrane and the other does not. Humans are eukaryotes.
B. There are many ways to classify organisms. They can be either bacteria or archaea.
C. There are three domains of life. All living creatures are a part of the Eukaryotic, Bacteria, or Archaea domain. There are six kingdoms, and organisms are grouped into kingdoms based on the complexity of their cell structure, how they reproduce, and how they obtain nutrients.
D. Organisms are everywhere. Some have a complex cell structure and some are unicellular. Some organisms thrive in extreme places. They are called archaea and can even live in hot springs and on ocean floors.

Answer 1

The passage details a classification system of life into three domains: Bacteria, Archaea, and Eukarya, distinguished by cellular complexity and genetic makeup.

Step-by-step explanation:

The correct summary of the passage regarding the classification of life forms is that scientists now recognize there are three domains of life, which encompass all known organisms. These domains are Bacteria, Archaea, and Eukarya. Prokaryotes, which include bacteria and archaea, lack membrane-bound nuclei and organelles, while eukaryotes, like plants, animals, and fungi, contain these complex structures. Eukaryotes can be unicellular or multicellular. The Archaea domain includes extremophiles that can inhabit harsh environments such as hot springs. This system of classification is based on genetic and biochemical characteristics, particularly the structure of cell membranes and rRNA sequences.