Chapter 19, Problem 6A

Summary Introduction

Introduction :

Organisms belonging to the Kingdom Protista are eukaryotes. A eukaryotic organism or a eukaryotic cell is characterized by the presence of membrane-bound organelles and the presence of the 80S ribosome. Although these organisms are eukaryotes, they are not considered as fungi, plants, or animals as they follow a different mode of reproduction.

Answer to Problem 6A

Correct answer :

The correct answer is option (a) algae.

Explanation of Solution

Explanation/justification for the correct answer :

Option (a) algae. The organism shown in the given figure does not have any structure like flagella or cilia that assist in motility. There is also a prominent cell wall with a symmetrical arrangement of the cells. Also, there is a connecting bridge between the two halves of a cell. These are the characteristic of Desmids that are a type of algae. So, the correct answer is option (a).

Explanation for incorrect answer :

Option (b) animal-like. Animal-like protists are also known as protozoans. Protozoans do not have a cell wall as can be prominently seen in the given figure. The given picture is of a Desmid that falls under the category algae. So, this is an incorrect option.

Option (c) fungus-like. Fungus-like protists are also termed as molds. The given figure is of a Desmid which is a type of algae and not mold. So, this is an incorrect answer.

Option (d) protozoan. Animal-like protists are also known as protozoans. Protozoans do not have a cell wall as can be prominently seen in the given figure. The given picture is of a Desmid that falls under the category algae. So, this is an incorrect answer.