Chapter 16, Problem 1STP

Summary Introduction

Introduction:

Based on his studies, Darwin hypothesized that new species may formed by gradual small changes in ancestral species. But he could not see how such a process works. To understand it better, he studied the process of selective breeding to formulate concept of natural selection.

Answer to Problem 1STP

Correct answer :

The correct answer is option (A) artificial selection

Explanation of Solution

Explanation/justification for the correct answer :

Option (A) artificial selection.The process of directed breeding to produce offspring with desired traits was called artificial selection by Darwin. Artificial selection carried out by humans to develop new breeds or new strains of organisms. Thus, artificial selection led to formulate natural selection. Thus, this is the correct answer.

The explanation for the incorrect answer :

Option (B) continental drift. It is a large-scale horizontal movement of continents relative to one another and to the ocean basins. Thus, this is an incorrect option.

Option (C) group selection. It is describes natural selection operating between groups of organisms, rather than between individuals. Thus, this is an incorrect answer.

Option (D) plant genetics. It refers to the study of mechanism of hereditary transmission in plants. Thus, this is an incorrect answer.