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Calculate the electrical force between protron at 1 Meyer apart

asked Apr 14, 2019 by 9732aniketkumar

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A tetrahedron has vertices at O=(0,0,0) A=(1,2,1) B=(2,1,3) C=(-1,1,2). The

asked Apr 14, 2019 by priyanshubugde02

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Correct ionization energy in Mn,Ni,Zn,Ti

asked Apr 14, 2019 by shakemaheen

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Integrate x^2-1/(x+2)^2√x^3+x^2+x

asked Apr 14, 2019 by priyanshubugde02

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20ml of liquid Ais mixed with 20ml of liquid B at particular temperature an

asked Apr 14, 2019 by rahulkapil012

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The product of a number and 72 exceeds the product of the number and 27 by

asked Apr 14, 2019 by ankitrajrathor123

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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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How many numbers lie between 12and 13

asked Apr 13, 2019 by farhanafawzana

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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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use the following data to calculate avogadros number. Density of NaCl=2.165

asked Apr 13, 2019 by somyasandilya7352208318

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An air capacitor is given a charge of 2microcoulomb raising its potential t

asked Apr 13, 2019 by dharshini3902

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Calculate the vant Hoff factor when 0.1 mol NH4Cl is dissolved in 1 L of wa

asked Apr 13, 2019 by shreeya4112

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The difference between two roots of the equation 3 2 x x x    

asked Apr 13, 2019 by chandana.aremanda

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Equal moles of benzene and toulene are mixed the V.P of benzene and toulene

asked Apr 13, 2019 by vijaymadduri.kumar

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the term apiculture refers to

asked Apr 13, 2019 by ayaankhan1776

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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?

asked Apr 13, 2019 by priyanka.clay6

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When does a species become founders to cause founder effect?

asked Apr 13, 2019 by priyanka.clay6

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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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Explain eutrophication.

asked Apr 13, 2019 by priyanka.clay6

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Write a note on sources of noise pollution and effect of noise pollution.

asked Apr 13, 2019 by priyanka.clay6

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Observe the following figure carefully and answer the questions that follow

asked Apr 13, 2019 by priyanka.clay6

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The less then 1% sunlight is present in which of the following zone

asked Apr 13, 2019 by ms0304208

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a)Why are catalytic convertors recommended for vehicles ? b)Why should such vehicles use only unleaded petrol. c)Why is CNG preferred to diesel as a fuel in vehicles.

asked Apr 13, 2019 by priyanka.clay6

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Enlist four harmful effects caused to the humans living in areas having polluted air. Suggest two measures to reduce air pollution.

asked Apr 13, 2019 by priyanka.clay6

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Deforestation is creating a lot of problems in the environment. List the consequences of deforestation.

asked Apr 13, 2019 by priyanka.clay6

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During the past century, lakes and ponds in many parts of the earth have been gradually converted into land. (a) What is the phenomenon called? (b) How does human activity accelerate this phenomenon ? (c) What measures can we take to control this?

asked Apr 13, 2019 by priyanka.clay6

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Explain bio magnification of DDT in an aquatic food chain. How does it affect the bird population?

asked Apr 13, 2019 by priyanka.clay6

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