Recent questions tagged evolution

Which of these would not be likely to increase differences between populations?

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Evolution is principally a process of

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Which of the following is vestigial in humans?

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Which one of the following set of structures includes only analogus organs?

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Homologus structures have

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The first horse like animal from which the modern horse Equus has evolved , Oligocene was the

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During fossil formation, the soft part decompose and harder ones are infiltrated by minerals and turn into stony shapes. This type of fossil is known as

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Two geographical regions separated by high mountains are

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Two geographical regions separated by high mountains are

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Carboniferous period of coal deposition was

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Fossils are now dated by

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Russian scientist who proposed the theory of origin of life was

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In what ways were conditions on early Earth different from those on Modern earth?

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Believers of spontaneous generation theory assumed that

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The presence of two chambered heart in tadpole of frog gives support to the theory of

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Genetic divergence of two populations can be countered by

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The resemblance between different groups due to common function or adaptation may be referred to as an example of

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The essence of Haeckel’s recapitulation theory is

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Which of the following is a vestigial organ in the human body?

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Which of the following is the evidence of evolution?

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The origin of first mammals occurred

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The earliest era in the geologic record is the

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In their laboratory simulation of early Earth, Urey and Miller observed the abiotic synthesis of

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Fossil X is older than fossil Y because

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Study of fossils is known as

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A fossil is a

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The first organisms were

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The English scientist who worked for the Origin of the life and settled in India?

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According to scientists, the Big Bang theory occurred approximately ________ years ago

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Which one of the following gases were not present in the free form at the time life originated on earth?

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Earth originated

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a.Name the primates that lived about 15 million years ago. List their characteristic features. b. Where was the first man-like animal found? c. Write the order in which Neanderthals, habilis and erectus appeared on the earth. State the brain capacity of each one of them. d. When did modern sapiens appear on this planet?

asked Apr 14, 2019 by priyanka.clay6

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How does Hardy-Weinberg equation explain genetic equilibrium ? Describe how this equilibrium gets disturbed which may lead to founder effect.

asked Apr 14, 2019 by priyanka.clay6

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Explain taking one example of vertebrate anatomy that evolution of life has occurred on earth. 'Nature selects for fitness'. Explain with suitable example.

asked Apr 14, 2019 by priyanka.clay6

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List the various causes of variations in the progeny of a population. Describe the three different ways in which natural selection operates in nature, with regard to organic evolution.

asked Apr 14, 2019 by priyanka.clay6

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How did Darwin's theory of natural selection explain the appearance of new forms of life on earth?

asked Apr 14, 2019 by priyanka.clay6

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Rearrange the following in an ascending order of evolutionary tree, reptiles, salamander, lobefins, frogs. Name two reproductive characters that make reptiles more successful than amphibians.

asked Apr 14, 2019 by priyanka.clay6

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Explain adaptive radiation and convergent evolution by taking examples of some Australian marsupials and Australian placental mammals OR (a) What is adaptive radiation? (b) Explain with the help of a suitable example, where adaptive radiation has occurred to represent convergent evolution.

asked Apr 14, 2019 by priyanka.clay6

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Name and explain the principle, the given equation represents : $p^2 + 2pq + q^2 = 1$

asked Apr 14, 2019 by priyanka.clay6

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Convergent evolution and divergent evolution are the two concepts explaining organic evolution. Explain each one with the help of an example.

asked Apr 14, 2019 by priyanka.clay6

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Branching descent and natural selection are the two key concepts of Darwinian theory of evolution. Explain each concept with the help of a suitable example.

asked Apr 14, 2019 by priyanka.clay6

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Study the schematic representation of evolutionary history of plant forms given below and mention: a. The plant form Ferns and Conifers are most related to. b. The nearest ancestors of flowering plants. c. The most primitive group of plants. d. Common ancestry Psilophyton provides to. e. The common ancestors of Psilophyton and seed ferns. f. The common ancestors of mosses and tracheophytes.

asked Apr 14, 2019 by priyanka.clay6

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Evolution is a change in the gene frequencies in a population in response to changes in the environment in a time scale of years and not centuries. Justify this statement with reference to DDT. How does the theory of Hugo de Vries support this?

asked Apr 14, 2019 by priyanka.clay6

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State the theory of abiogenesis. How does Miller's experiment support this theory? OR State the views of Oparin and Haldane on evolution. How does S.L. Miller's experiment support their views? OR Explain the theory of abiogenesis. How did Miller demonstrate experimentally the chemical evolution that happened three billion years ago?

asked Apr 14, 2019 by priyanka.clay6

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Explain the increase in the numbers of melanic (dark-winged) moths in the urban areas of post-industrialisation period in England. OR How does industrial melanism support Darwin's theory of Natural Selection? Explain.

asked Apr 14, 2019 by priyanka.clay6

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Anthropogenic action can hasten evolution. Explain with the help of a suitable example.

asked Apr 14, 2019 by priyanka.clay6

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What does the comparison between the eyes of Octopus and those of mammals say about their ancestry and evolution?

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How is genetic drift different from gene migration?

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How does 'fitness' of a population help in evolution?

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Give the sum total of all the allelic frequencies in a stable population. List any two factors which disturb the stability of a population. How does this disturbance affect the population?

asked Apr 14, 2019 by priyanka.clay6

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