Chapter 23, Problem 7A

Summary Introduction

Introduction :

The asexual reproduction in plants to form a new plant is termed as vegetative reproduction. In this phenomenon a new plant can be grown by undergoing fragmentationin the parent plant. A plant like liverworts and mosses reproduces through this process. They form spores that disperse to form new plants. The vegetative reproduction maintains the uniformity of features in plants, produce genetically identical plants, and the reproduction rate is high.

Answer to Problem 7A

Correct answer :

The correct answer is option (D)greater genetic variation.

Explanation of Solution

Explanation/justification for the correct answer :

Option (D)greater genetic variation. In vegetative reproduction process, the genetic variation is very less. It reproduces repeatedly with same features; therefore it is a disadvantage of vegetative reproduction. So, the correct answer is option (D).

Explanation for incorrect answer :

Option (A)uniform plant features. In vegetative reproduction the new plant is formed from the parent by developing a bud, therefore the features from the parent passes from generation to generation in a uniform way. Thus, this is an advantage of vegetative reproduction. So, this is an incorrect option.

Option (B) genetically identical plants. Due to the production of new plants from a part of parents the genetical identification is maintained in this process. Thus, this is an advantage of vegetative reproduction.So, this is an incorrect answer.

Option (C) faster reproduction. The vegetative reproduction process takes very less time to produce new plants hence, have high reproduction rate. So, this is an incorrect answer.