Chapter 21, Problem 8STP

Summary Introduction

Introduction :

Protists are from the protista kingdom, lined with numerous forms of protists as well as sexual and asexual reproduction. A multitude of sexual adaptations have been developed by protists to match their environments and characteristics. The method of reproduction the protists use is affected by their cycles of life. Most protists use a mix of sexual and asexual reproduction but some use only one.

Answer to Problem 8STP

Correct answer :

The correct answer is option (D) It restores injured parts.

Explanation of Solution

Explanation/justification for the correct answer :

Option (D) It restores injured parts. The asexual reproduction in protists is takes place through binary fission or budding process. But the binary fission is an unstable process of asexual reproduction, therefore, the organism entered to sexual reproduction process that is conjugation. This is to prevent the injury or death caused during the process of binary fission. So, the correct answer is option (D).

Explanation for incorrect answer :

Option (A) It expands the habitats. Protists undergo both asexual and sexual reproduction process and both the process are involves in the expansion of habitats. So, this is an incorrect option.

Option (B) It improves the locomotion speed. The conjugation process is a form of sexual reproduction in which two protists exchange their genetic materials. It is nothing to do with the locomotion speed of the organism. So, this is an incorrect answer.

Option (C) It increases the genetic variation. The sexual reproduction may responsible for the increase of genetic materials but in the case of protists they enter the sexual reproduction phase to maintain the stability. So, this is an incorrect answer.