Chapter 19, Problem 5A

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 5A

Correct answer :

The correct answer is option (d) dry sand.

Explanation of Solution

Explanation/justification for the correct answer :

Option (d) dry sand. Dry sand is a region that lacks moisture and has high porosity. Protists require a moist region to survive. So, the correct answer is option (d).

Explanation for incorrect answer :

Option (a) decaying leaves. Decaying leaves are the ones that are shed by the plants and are acted upon by different organisms to decompose them. Leaves have moisture content and protists like molds can grow on them. So, this is an incorrect option.

Option (b) the ocean. An ocean is a large source of saltwater that covers approximately 71% of the total area on Earth. Protists like algae live in oceans. So, this is an incorrect answer.

Option (c) damp soil. Damp soil is the one that has a considerable amount of moisture. Protists form a major microbiome of the soil. So, this is an incorrect answer.