Question:
A living connecting link which provides evidence for organic evolution is
A living connecting link which provides evidence for organic evolution is
Updated On: Jul 5, 2022
- Sphenodon between reptiles and birds
- Archaeopteryx between reptiles and birds
- Lung fishes between pisces and reptiles
- Duck billed platypus between reptiles and mammals
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The Correct Option is D
Solution and Explanation
Egg-laying mammals (e.g., duck-billed platypus) bear hair and mammary glands, but also possess some of the reptilian characters such as laying of eggs, presence of cloaca and some skeletal similarities. Thus, they are connecting link between reptiles and mammals. An extinct organism with characters intermediate between two classification groups is known as missing link e.g., Archaeopteryx.
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Concepts Used:
Evolution
Evolution is a process that occurs in changes in the genetic content of a population over time. Evolutionary change is generally classified into two: microevolution and macroevolution. The process of changes in allele frequencies in a population over time is a microevolutionary process. Three main mechanisms that cause allele frequency change are natural selection, genetic drift, and gene flow. On the other hand, macroevolution refers to change at or above the level of the species.