Samacheer Kalvi solutions for Biology (Zoology) [English] Class 12 TN Board chapter 6 - Evolution [Latest edition]

The first life on earth originated ____________.

Who published the book “Origin of species by Natural Selection” in 1859?

Which of the following was the contribution of Hugo de Vries?

The wings of birds and butterflies is an example of ____________.

The phenomenon of “Industrial Melanism” demonstrates ____________.

Darwin’s finches are an excellent example of ____________.

Who proposed the Germplasm theory?

The age of fossils can be determined by ____________.

Fossils are generally found in ____________.

Evolutionary history of an organism is called ____________.

The golden age of reptiles was ____________.

Which period was called “Age of fishes”?

Modern man belongs to which period?

The Neanderthal man had the brain capacity of ____________.

According to Darwin, the organic evolution is due to ____________.

A population will not exist in Hardly Weiberg equilibrium if ____________.

List out the major gases that seem to be found in the primitive earth.

Explain the three major categories in which fossilization occurs?

Differentiate between divergent evolution and convergent evolution with one example for each.

How does Hardy-Weinberg’s expression (p²+2pq+q²=1) explain that genetic equilibrium is maintained in a population? List any four factors that can disturb the genetic equilibrium.

Explain how mutations, natural selection and genetic drift affect Hardy Weinberg equilibrium.

How did Darwin explain fitness of organisms?

Mention the main objections to Darwinism.

Mention the main objections to Darwinism.

Taking the example of Peppered moth, explain the action of natural selection. What do you call the above phenomenon?

Darwin's finches and Australian marsupials are suitable examples of adaptive radiation - Justify the statement.

Who disproved Lamarck’s Theory of acquired characters? How?

How does Mutation theory of De Vries differ from Lamarck and Darwin’s view in the origin of new species.

Explain stabilizing, directional and disruptive selection with examples.

Rearrange the descent in human evolution

Austrolopithecus → Homo erectus → Homo sapiens → Ramapithecus → Homo habilis.

How does Neanderthal man differ from the modern man in appearance?

Define isolating mechanism and explain its types with suitable examples.

Define speciation according to A.E. Emerson and explain its types giving suitable examples.

Give an account on the major causes for the extinction of a particular species on earth.

Explain the three level of impact of extinction of species.