Chapter 17, Problem 29A

Summary Introduction

Introduction:

The broadest category in the classification system is the domain. There are three domains: Bacteria, Archaea, and Eukarya. Within these domains are six kingdoms. Domain Bacteria and domain Achaea has one kingdom each but domain Eukarya has four kingdoms: Protista, Fungi, Plantae and Animalia.

Answer to Problem 29A

Correct answer:

The correct answer is option C. Protista

Explanation of Solution

Explanation/justification for the correct answer:

Option C. Protista − Members of this kingdom are eukaryotes. They can be unicellular, colonial or multicellular. Unlike plants or animals thy do not have organs. Plant- like protists are called algae. They have chloroplasts and can perform photosynthesis. They have cell walls with cellulose in some. Examples are algae, protozoa and slime molds. The organism shown in the given figure, therefore, belongs to Protista.

Hence this is the correct option.

Explanation for incorrect answer:

Option A. Plantae−These are a diverse group of organisms that are multicellular, have cell walls, chloroplasts and organs. Hence this is not the correct option.

Option B. Animalia- These include organisms that are multicellular, do not have cell walls and chloroplasts. They are heterotrophic in nutrition. The animal cells are organized into tissues which are further organized into organs. Hence this is not the correct option.

Option D. Fungi − Members of this kingdom do not have chloroplasts. They have cell walls. Hence this is not the correct option.