Chapter 26, Problem 7STP

Summary Introduction

Introduction :

Sexual reproduction is the creation of a new organism after two gametes have united. In humans as in most other eukaryotes — plants and animals alike -the two gametes fuse to form the zygote. It brings genetic variation in the offspring. The offspring can adapt to new environmental conditions.

Answer to Problem 7STP

Correct answer :

The correct answer is option (B) fertilization

Explanation of Solution

Explanation/justification for the correct answer :

Option (B) fertilization. Fertilization is characterized as the process that happens when a single sperm enters a mature egg, releasing its DNA into the center of that egg, allowing the fusion of the two sets of DNA to create a human zygote, a single-celled embryo. So, the correct answer is option (B).

Explanation for incorrect answer :

Option (A) budding. Budding is a form of asexual reproduction in which a new organism emerges at one specific location from an outgrowth or bud due to cell division. The tiny bulb-like projection that emerges from the yeast cell is known as bud. So, this is an incorrect answer.

Option (C) fragmentation. Multicellular fragmentation is a type of asexual reproduction in which an individual is split into fragments. Every of these fragments grow into fully developed species that are genetically and morphologically similar with their parents. So, this is an incorrect answer.

Option (D) pathogenesis. A disease's pathogenesis is the biological process which leads to a diseased condition. So, this is an incorrect answer.