Recent questions tagged 2016

In bryophytes and pteridophytes, transport of male gametes requires :

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Which one of the following statements is not true?

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When does the growth rate of a population following the logistic model equal zero? The logistic model is given as $dN/dt = rN(1-N/K)$ :

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Which of the following is wrongly matched in the given table?

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Which of the following is required as inducer(s) for the expression of Lac operon?

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The term ecosystem was coined by :

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In mammals, which blood vessel would normally carry largest amount of urea?

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In the stomach, gastric acid is secreted by the :

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Which of the following guards the opening of hepatopancreatic duct into the duodenum?

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Cotyledon of maize grain is called :

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Water vapour comes out from the plant leaf through the stomatal opening. Through the same stomatal opening carbon dioxide diffuses into the plant during photosynthesis. Reason out the above statements using one of following options :

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Which of the following would appear as the pioneer organisms on bare rocks?

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Which of the following is a restriction endonuclease ?

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Which one of the following statements is wrong ?

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Lack of relaxation between successive stimuli in sustained muscle contraction is known as

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Reduction in pH of blood will-

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In which of the following, all three are macronutrients ?

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Tricarpellary, syncarpous gynoecium is found in flowers of

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Which one of the following is a characteristic feature of cropland ecosystem ?

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Depletion of which gas in the atmosphere can lead to an increased incidence of skin cancers

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A tall true breeding garden pea plant is crossed with a dwarf true breeding garden pea plant. When the $F_1$ plants were selfed the resulting genotypes were in the ratio of -

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It is much easier for a small animals to run uphill than for a large animal, because -

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Identify the correct statement on 'inhibin' -

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The primitive prokaryotes responsible for the production of biogas from the dung of ruminant animals include the -

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Chrysophytes, Euglenoids, Dinoflagellates and Slime moulds are included in the kingdom

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Photosensitive compound in human eye is made up of -

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Mitochondria and chloroplast are- (a) semi-autonomous organelles (b) formed by division of pre existing organelles and they contain DNA but lack protein synthesising machinery Which one of the following options is correct?

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Microtubules are the constituents of -

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Change in GnRH pulse frequency in females is controlled by circulating levels of -

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Which of the following characteristic features always holds true for the corresponding group of animals ?

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Gause's principle of competitive exclusion states that

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A system of rotating crops with legume or grass pasture to improve soil structure and fertility is called -

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Following are the two statements regarding the origin of life - (a) The earliest organisms that appeared on the earth were non-green and presumably anaerobes (b) The first autotrophic organisms were the chemoautotrophs that never released oxygen Of the above statements which one of the following options is correct ?

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A river with an inflow of domestic sewage rich in organic waste may result in -

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Which one of the following is the starter codon ?

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Fertilization in humans is practically feasible only if

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Specialised epidermal cells surrounding the guard cells are called -

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Which of the following pairs of hormones are not antagonitic (having opposite effects) to each other ?

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Which type of tissue correctly matches with its locations ?

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Which of the following statements is not true for cancer cells in relation to mutations ?

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Which of the following statements is wrong for viroids ?

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Which part of the tobacco plant is infected by Meloidogyne incognita ?

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The standard petal of a papilionaceous corolla is also called -

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Which of the following most appropriately describes haemophilia ?

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The taq polymerase enzyme is obtained from

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Antivenom injection contains preformed antibodies while polio drops that are administered into the body contain -

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In meiosis crossing over is initiated at :

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Nomenclature is governed by certain universal rules. Which one of the following is contrary to the rules of nomenclature ?

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In a chloroplast the highest number of protons are found in

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Stems modified into flat green organs performing the functions of leaves are known as

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