Chapter 23, Problem 7STP

Summary Introduction

Introduction:

Fungi can be either single or multicellular species that are very complex. They are present in almost any environment, but most of them live on the ground, often in soil. It is a member of the eukaryotic organism community which includes micro-organisms such as yeasts and molds, as well as the more common mushrooms. These organisms are classified as a kingdom, which is separate from the other eukaryotic life kingdoms of plants and animals.

Answer to Problem 7STP

Correct answer:

The correct answer is option (C) hyphae are not divided by cross walls.

Explanation of Solution

Explanation/justification for the correct answer:

Option (C) Hyphae are not divided by cross walls. The aseptate fungi are those fungi in which the hyphae cells are not divided by the cross-walls that is termed as septa.So, the correct answer is option (C).

Explanation for incorrect answer:

Option (A) Cell wall is made of cellulose. The cell wall of fungi is made of chitin. That gives them protection under stress conditions.So, this is an incorrect option.

Option (C)Cell walls are made of a thin membrane. The cell wall of all type of fungi whether it is septate or aseptate have a thin membrane. So, this is an incorrect answer.

Option (D) Hyphae are not present except during reproduction. The hyphae are present in all types of fungi development but in aseptate fungi, the hyphae are not divided by septa.So, this is an incorrect answer.