Hugo de Vries gave his mutation theory on organic evolution while working on
- Pisum sativum
- Drosophila melanogaster
- Oenothera lamarckiana
- Althea rosea
The Correct Option is C
Solution and Explanation
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- A convex lens $'A'$ of focal length $20\, cm$ and a concave lens $'B'$ of focal length $5\, cm$ are kept along the same axis with a distance $'d'$ between them. If a parallel beam of light falling on $'A'$ leaves $'B'$ as a parallel beam, then the distance $'d'$ in cm will be :
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Concepts Used:
Mechanisms of Evolution
The mechanism of evolution has been explained with theories such as the Big Bang Theory, the Theory of Darwin, and the Hardy-Weinberg Equilibrium where evolution is the process of natural selection that causes changes in the traits of species over multiple generations.
The Big Bang Theory:
The most widely accepted theory for the origin of life on Earth and its various forms is the Big Bang Theory. According to the hypothesis, as a result of a massive explosion, the universe was created 20 billion years ago.
Hardy-Weinberg Equilibrium:
According to the idea of Hardy-Weinberg, allelic frequency and gene pool remain stable throughout generations. Furthermore, the allelic frequencies add up to 1.
Theory of Darwin:
The Theory of Darwin's natural selection hypothesis provided a more reasonable explanation for the emergence of new species. As a result of adaptation to changing environmental conditions, natural selection led to the evolution of multiple species from a single species.