Chapter 12, Problem 1RQ

The term “metazoan” is synonymous with “animal.” Are there any single-celled animals? How are single-celled eukaryotes classified?

Summary Introduction

To describe: Whether there are single-celled animals.

Introduction: An organism is defined as the living thing that has no organized structure. The organism can react to stimuli, reproduce, grow, adapt, and maintain homeostasis.

Explanation of Solution

Animals are a multicellular eukaryotic organism that forms the biological kingdom of Animalia. Since the animals are multicellular currently there is no single-celled animals.

Summary Introduction

To describe: That how single-celled eukaryotes are classified.

Explanation of Solution

The single-celled eukaryotes are referred to as unicellular eukaryotes. The single-celled microorganism is classified with a defined nucleus, mitochondria, and other organelles. It includes algae, or phytoplankton, and protozoa, or zooplankton.