Recent questions tagged evolution

How is 'mutation' explained by Hugo de Vries different from the Darwinian variations?

asked Apr 13, 2019 by priyanka.clay6

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Why are the wings of butterfly and birds said to be analogous organs? Name the type of evolution, the analogous organs are a result of?

asked Apr 13, 2019 by priyanka.clay6

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Write Oparin and Haldane`s hypothesis about the origin of life on Earth. How does meteorite analysis favour this hypothesis?

asked Apr 13, 2019 by priyanka.clay6

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Convergent evolution leads to analogous structures. Explain with the help of an example.

asked Apr 13, 2019 by priyanka.clay6

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Divergent evolution leads to homologous structures. Explain with the help of an example.

asked Apr 13, 2019 by priyanka.clay6

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Categorise the following pairs of examples as convergent or divergent evolutions : a. Eyes of Octopus and mammals. b. Wings of butterfly and birds. c. Tuber of sweet potatoes and potato. d. Thorns in Bougainvillea and tendrils in Cucurbits.

asked Apr 13, 2019 by priyanka.clay6

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Name the ancestors of man based on the features given below : a. Human-like meat eater with 900 cc brain lived in Java. b. More human with brain size 1400 cc, lived in Central Asia, used hides and buried their dead. c. Human-like, vegetarian, with brain capacity between 650 cc and 800 cc. d. Man-like primate, that existed about 15 mya. Fossils found in Tanzania.

asked Apr 13, 2019 by priyanka.clay6

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How does palaeontological evidence support evolution of organisms on Earth?

asked Apr 13, 2019 by priyanka.clay6

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Write about the ancestry and evolution of bat, horse and human on the basis of a comparative study of their forelimbs. What are these limbs categorised as?

asked Apr 13, 2019 by priyanka.clay6

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List the two main propositions of Oparin and Haldane.

asked Apr 13, 2019 by priyanka.clay6

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How do Darwin's finches illustrate adaptive radiation?

asked Apr 13, 2019 by priyanka.clay6

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Mention the type of evolution that has brought the similarity as seen in potato tuber and sweet potato.

asked Apr 13, 2019 by priyanka.clay6

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Pick out the ancestral line of Angiosperms from the list give below: Conifers, Seed ferns, Cycads, Ferns.

asked Apr 13, 2019 by priyanka.clay6

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List the two characteristics of mutation that help in explaining evolution according to De Vries.

asked Apr 13, 2019 by priyanka.clay6

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What did Louis Pasteur's experiments on 'killed yeast' demonstrate? Name the theory that got disproved on the basis of his experiment.

asked Apr 13, 2019 by priyanka.clay6

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Identify the examples of convergent evolution from the following: a. Flippers of penguins and dolphins. b. Eyes of octopus and mammals c. Vertebrate brains

asked Apr 13, 2019 by priyanka.clay6

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Mention what caused evolution according to de Vries. OR What causes speciation according to Hugo de Vries?

asked Apr 13, 2019 by priyanka.clay6

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Name the placental mammals corresponding to the Australian 'spotted cuscus' and 'Tasmanian tiger cat', which have evolved as a result of convergent evolution.

asked Apr 13, 2019 by priyanka.clay6

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Why are lichens regarded as pollution indicators?

asked Apr 13, 2019 by priyanka.clay6

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Are the thorns of Bougainvillea and tendrils of Cucurbita homologous or analogous? What type of evolution has brought such a similarity in them?

asked Apr 13, 2019 by priyanka.clay6

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Study the ladder of human evolution given above and answer the following questions : a. Where did Australopithecines evolve ? b. Write the scientific name of Java man.

asked Apr 13, 2019 by priyanka.clay6

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What does Hardy-Weinberg equation $p^2 + 2pq + q^2 = 1$, convey?

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When does a species become founders to cause founder effect?

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Coelacanth was caught in 1938 in South Africa. Why is it very significant in the evolutionary history of vertebrates?

asked Apr 13, 2019 by priyanka.clay6

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Comment on the similarity between the wing of a cockroach and the wing of a bird. What do you infer from the above with reference to evolution?

asked Apr 13, 2019 by priyanka.clay6

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Write the similarity between the wing of a butterfly and the wing of a bat. What do you infer from the above with reference to evolution?

asked Apr 13, 2019 by priyanka.clay6

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Identify the examples of homologous structures from the following: a. Vertebrate hearts. b. Thorns in Bougainvillea and tendrils of Cucurbita. c. Food storage organs in sweet potato and potato.

asked Apr 13, 2019 by priyanka.clay6

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Write the formula to calculate allele frequency in future generations according to Hardy – Weinberg genetic equilibrium.

asked Apr 13, 2019 by priyanka.clay6

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Two organisms occupying a particular geographical area (say desert) show similar adaptive strategies

asked Jul 7, 2017 by pady_1

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What are the key concepts in the evolutionary theory of Darwin?

asked Jul 7, 2017 by pady_1

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You have studied the story of peppered moths in England. Had industries been removed, what impact co

asked Jul 7, 2017 by pady_1

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<div>How do you express the meaning of words like race, breed, cultivar and a variety?</div><div></d

asked Jul 6, 2017 by pady_1

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State and explain any three factors affecting allele frequency in populations.

asked Jul 6, 2017 by pady_1

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The evolutionary story of moths of England during industrialization reveals that 'evolution is evolu

asked Jul 6, 2017 by pady_1

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While creation and presence of variation is directionless, natural selection is directional as it is

asked Jul 6, 2017 by pady_1

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The scientists believe that evolution is gradual. But extinction, part of evolutionary story are 'su

asked Jul 6, 2017 by pady_1

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Enumerate three most characteristic criteria for designating a Mendelian population.

asked Jul 6, 2017 by pady_1

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Why is nascent oxygen supposed to be toxic to aerobic life forms?

asked Jul 6, 2017 by pady_1

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Louis Pasteur's experiments, if you recall, proved that life could arise from only pre existing life

asked Jul 6, 2017 by pady_1

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Among Ramapithecus, Australopithecines and **** habilis-who probably did not eat meat?

asked Jul 6, 2017 by pady_1

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By what name was the first hominid was knnown?

asked Jul 6, 2017 by pady_1

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Who among the Dryopithecus or Ramapithecus more man like?

asked Jul 6, 2017 by pady_1

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What is founder effect? 

asked Jul 6, 2017 by pady_1

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Among the five factors that are known to affect Hardy - Weinberg equilibrium, three factors are gene

asked Jul 6, 2017 by pady_1

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When we talk of functional macromolecules (proteins, enzymes, hormones, receptors, antibodies etc) t

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How do we compute the age of a rock?

asked Jul 6, 2017 by pady_1

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What is the most important pre-condition for adaptive radiation?

asked Jul 6, 2017 by pady_1

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How do we compute the age of a fossil?

asked Jul 6, 2017 by pady_1

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Give an example of convergent evolution and identify the features towards which they are converging.

asked Jul 6, 2017 by pady_1

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How do we compute the age of a living tree?

asked Jul 6, 2017 by pady_1

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