Which evidence of evolution related to Darwin's finches:
- Evidences from biogeographical distribution
- Evidences from comparative anatomy
- Evidences from embryology
- Evidences from palaeontological
The Correct Option is A
Solution and Explanation
Evidence related to Darwin's finches primarily comes from biogeographical distribution. Charles Darwin's observations of finches on the Galápagos Islands played a crucial role in the development of his theory of evolution by natural selection. He noted that different species of finches on various islands had distinct beak shapes and behaviors adapted to their specific environments. This observation highlighted the role of geographical isolation and adaptation in the evolution of species.
So, the correct option is (A): Evidences from biogeographical distribution
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- How does the process of Natural Selection affect Hardy-Weinberg equilibrium? Explain with the help of graphs.
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(b) Cite an example where more than one adaptive radiation has occurred in an isolated geographical area. Name the type of evolution your example depicts. - (a) "The process of evolution of different species in a given geographical area starts from a point and literally radiates to other geographical areas." Explain it with an example.
(b) Cite an example where more than one adaptive radiation has occurred in an isolated geographical area. Name the type of evolution your example depicts. - A few stages and their respective time period in the evolutionary history of human beings are mentioned in the flowchart given below:
- 15 mya — Primates walking like gorillas and chimpanzees existed.
- 3–4 mya — Man-like primates walked in Eastern Africa. Fossils of their bones were discovered.
- 2 mya — This ancestor lived in the East African grasslands and ate fruits.
- 1.5 mya — This hominid had a brain size of 900 cc and probably ate meat.
- [(a)] Name one primate about 15 mya.
- [(b)] Name one place where fossils of primates were discovered in Eastern Africa.
- [(c)] Name the ancestor that lived in the East African grasslands about 2 mya.
- [(d)] Name the hominid that was found around 1.5 mya.
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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.