Recent questions tagged botany

Pollen tablets are avalable in the market for:

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An aggregate fruit is one which devloped from

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Male gametophyte with least number of cells is present in :

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Geitonogamy involves

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Which one of the following growth regulators is known as stress hormone?

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A few normal seedling of tomato were kept in a dark room.After few days they were found to have become white- coloured like albions , Which of the following terms will you use to describe them ?

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Anoxygenic photosynthesis is characteristic of:

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In which one of the following processes $CO_2$ is not released?

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Deficiency symptoms of nitrogen and potassium are visible first in:

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Dr F. Went noted that if coleoptile tips were removed and placed on agar for one hour, the agar would produce a bending when placed on one side of freshly- cut coleoptile stumps. Of what significance is this experiment ?

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Match the following and select the correct answer : <br>

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During which phase(s) of cell cycle, amount of DNA in a cell remains at 4 C level if the initial amount is denoted as 2C ?

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The osmotic expansion of a cell kept in water is chiefly regulated by:

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The solid linear cytoskeletal elements having a diameter of 6 nm and made up of a single type of monomer are known as:

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Which structures perform the function of mitochondria in bacteria?

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An example of edible underground stem is:

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Tracheids differ from the tracheary elements in :

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Which one of the following statements is correct?

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You are given a fairly old piece of dicot stem and a dicot root. Which of the following anatomical structures will your use to distinguish between the two?

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When the margins of sepals or petals overlap one another without any particular direction, the condition is termed as:

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Placenta and pericarp are both edible portions in :

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Which of the following is responsible for peat formation?

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Which one of the following is wrong about Chara?

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Archaebacteria differ from eubacteria in:

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Which one of the following fungi contains hallucinogens?

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Five kingdom system of classification suggested by R.H. Whittaker is not based on:

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the following shows isogamy with non-flagellated gametes?

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The Air Prevention and control of pollution Act came into force in :

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Global warming can be controlled by :

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A sedentary sea anemone gets attached to the shell lining of hermit crab. The association is :

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Which one of the following processes during decomposition is correctly described ?

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A biologist studied the population of rats in a barn, He found that the average natality was 250, average mortality 240, immigration 20 and emigration 30. The net increase in population is :

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During sewage treatment, biogases are produced which include :

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In plant breeding programmes, the entire collection (of plants/seeds) having all the diverse alleles for all genes in a given crop is called :

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Which enzyme/s will be produced in a cell in which there is a non-sense mutation in the lac Y gene ?

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The diagram shows an important concept in the genetic implication of DNA. Fill in the blanks A to C. <br>

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If both parents are carriers for thalessemia, which is an autosomal recessive disorder, what are the chances of pregnancy resulting in an affected child ?

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The incorrect statement with regard to Haemophilia is :

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Which mendelian idea is depicted by a cross in which the $F_1$ generation resembles both the parents ?

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A stage in cell division is shown in the figure. Select the answer which gives correct identification of the stage with its characteristics <br>

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Which one of the following organelle in the figure correctly matches with its function ? <br> <img src = ""/>

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Kyoto - Protocol was endorsed at :

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Which one of the following is not used for ex situ plant conservation?

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Secondary productivity is rate of formation of new organic matter by

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Natural reservoir of phosphorus is

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Which of the following are likely to be present in deep sea water ?

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The colonies of recombinant bacteria appear white in contrast to blue colonies of non-recombinant bacteria because of

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Which of the following is not correctly matched for the organism and its cell wall degrading enzyme ?

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If two persons with 'AB' blood group marry and have sufficiently large number of children, these children could be classified as 'A' blood group : 'AB' blood group : 'B' blood group in 1 : 2 : 1 ratio. Modem technique of protin electrophoresis reveals presence of both 'A' and 'B' type proteins in 'AB' blood group individuals. This is an example of

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Which of the following statements is not true of two genes that show 50% recombination frequency ?

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