Recent questions tagged botany

Constipation, abdominal pain and cramps and stools with mucus and blood are indicative of the disease caused by

asked Mar 24, 2014 by pady_1

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State which of the following is true:

asked Mar 24, 2014 by pady_1

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Match the Disease Caustive

asked Mar 24, 2014 by pady_1

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Condition where the finger nails and lips turning gray to bluish is characteristic of

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Dysentry, plague and diphtheria are examples of

asked Mar 24, 2014 by pady_1

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Intestinal perforation might chraracterise

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Cancer is an example of

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In gene therapy

asked Mar 24, 2014 by pady_1

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1. Each primary oocyte then gets surrounded by a layer of granulosa cells and is called the primary follicle. 2. The primary follicles get surrounded by more layers of granulosa cells and a new theca and are called secondary follicles. 3. The secondary follicle soon transforms into a tertiary follicle which is characterised by a fluid filled cavity called antrum. Regarding 1,2 and 3 :

asked Mar 20, 2014 by pady_1

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Which of the following statements is true about Glycocalyx?

asked Mar 20, 2014 by pady_1

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Regarding G.N. RAMACHANDRAN: 1. He was the founder of the ‘Madras school’ of conformational analysis of biopolymers. 2. His discovery of the triple helical structure of collagen published in Nature in 1954 3. His analysis of the allowed conformations of proteins through the use of the ‘Ramachandran plot’ rank among the most outstanding contributions in structural biology. Regarding 1,2 and 3:

asked Mar 20, 2014 by pady_1

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1. Sponges have a water transport or canal system. 2. Water enters through minute pores (osculum) in the body wall into a central cavity, spongocoel, from where it goes out through the ostia. 3. This pathway of water transport is helpful in food gathering, respiratory exchange and removal of waste. Regarding 1,2 and 3:

asked Mar 20, 2014 by pady_1

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1. Double fertilisation is an event unique to angiosperms and gymnosperms. 2. The zygote develops into an embryo 3. Primary endosperm nucleus (PEN) develops into endosperm which provides nourishment to the developing embryo. 4. The synergids and antipodals degenerate after fertilisation. 5. During these events the ovules develop into seeds and the ovaries develop into fruit. Regarding 1,2,3,4 and 5:

asked Mar 20, 2014 by pady_1

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In angiosperm : 1. After pollination, the pollen grains germinate on the stigma and the resulting pollen tubes grow through the tissues of stigma and style and reach the ovule. 2. The pollen tubes enter the embryo-sac where two male gametes are discharged. 3. One of the male gametes fuses with the egg cell to form a zygote (syngamy). 4. The other male gamete fuses with the diploid secondary nucleus to produce the triploid primary endosperm nucleus (PEN). 5. This event is termed as double fertilisation Regarding 1,2,3,4 and 5:

asked Mar 20, 2014 by pady_1

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In flower (of angiosperm) : 1. Each of the cells of an embryo-sac is haploid. 2. Each embryo-sac has a three-celled egg apparatus – one egg cell and two synergids, two antipodal cells and three polar nuclei. 3. The two synergids fuse to produce a diploid secondary nucleus. Regarding 1,2 and 3:

asked Mar 20, 2014 by pady_1

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In flower (of angiosperm) : 1. The anthers, following meiosis, produce pollen grains. 2. The embryo-sac formation preceeds meiosis. 3. Each of the cells of an embryo-sac is haploid. Regarding 1,2 and 3:

asked Mar 20, 2014 by pady_1

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In gymnosperms : 1. The pollen grain is released from the microsporangium. 2. Pollen grains are carried in air currents and come in contact with the opening of the ovules borne on megasporophylls. 3. The pollen tube carrying the male gametes grows towards archegonia in the ovules and discharge their contents near the mouth of the archegonia. 4. Following fertilisation, zygote develops into an embryo and the ovules into seeds. 5.The seeds are not covered. Regarding 1,2,3,4 and 5:

asked Mar 20, 2014 by pady_1

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In gymnosperms :

asked Mar 20, 2014 by pady_1

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1. Lichens are symbiotic associations between algae and fungi. 2.The algal component is known as mycobiont and fungal component as phycobiont 3. Algal component is autotrophic and fungal component is heterotrophic 4.Algae absorb water and prepare food for fungi and fungi provide shelter and absorb mineral nutrients for its partner. 5. Lichens are very good pollution indicators - they grow well in polluted areas Regarding 1,2,3,4 and 5:

asked Mar 20, 2014 by pady_1

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1. Archaebacteria differ from other bacteria in having a different cell wall structure 2. Methanogens live in marshy areas and halophiles live in hot springs. 3. Methanogens are present in the gut of several ruminant animals

asked Mar 20, 2014 by pady_1

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1. The scientific names need not always ensure that each organism has only one name. 2. Description of any organism should enable the people (in any part of the world) to arrive at the same name. 3. While naming a new organism suh a name may have been used for some other closely related known organism.

asked Mar 20, 2014 by pady_1

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1. Double fertilisation is an event unique to angiosperms and gymnosperms. 2. The zygote develops into an embryo 3. Primary endosperm nucleus (PEN) develops into endosperm which provides nourishment to the developing embryo. 4. The synergids and antipodals degenerate after fertilisation. 5. During these events the ovules develop into seeds and the ovaries develop into fruit. Regarding 1,2,3,4 and 5:

asked Jan 6, 2014 by pady_1

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In gymnosperms : 1. The megaspore mother cell is differentiated from few of the cells of the nucellus. 2. The nucellus is protected by envelopes and the composite structure is called an ovule. 3. The ovules are borne on megasporophylls which may be clustered to form the female cones. Regarding 1,2 and 3:

asked Jan 6, 2014 by pady_1

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1. In 1979, T.O. Diener discovered a new infectious agent that was smaller than viruses and caused potato spindle tuber disease. 2. It was found to be a free RNA; 3. it lacked the protein coat that is found in viruses, hence the name viroid. 4.The RNA of the viroid was of high molecular weight. Regarding 1,2,3 and 4:

asked Jan 6, 2014 by pady_1

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Mesosome help in :

asked Jan 3, 2014 by pady_1

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The cell wall :

asked Jan 3, 2014 by pady_1

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Syngamy and Triple fusion are respectively:

asked Jan 3, 2014 by pady_1

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The male and the female gametophytes do not have an independent free-living existence and they remain within the sporangia retained on the sporophytes in

asked Jan 3, 2014 by pady_1

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Regarding Algae's ecological importance choose the incorrect one:

asked Jan 3, 2014 by pady_1

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One of the natural classification systems developed by George Bentham and Joseph Dalton Hooker for classification of flowering plants did not include:

asked Jan 3, 2014 by pady_1

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Assertion (A): Infectious free RNA that caused potato spindle tuber disease was named as viroid Reason (R): It was named so because the RNA of the viroid was of low molecular weight.

asked Jan 3, 2014 by pady_1

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In plants, the symptoms of viral diseases are:

asked Jan 3, 2014 by pady_1

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Choose the odd one out:

asked Jan 3, 2014 by pady_1

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By R.H. Whittaker's Five Kingdom Classification Assertion (A) : Kingdom Protista has brought together Chlamydomonas, Chlorella (earlier placed in Algae within Plants and both having cell walls) with Paramoecium and Amoeba (which were earlier placed in the animal kingdom which lack cell wall). Reason (R) : It has put together organisms which, in earlier classifications, were placed in different kingdoms. Regarding (A) and (R)

asked Jan 3, 2014 by pady_1

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Regarding Keys choose the incorrect one:

asked Jan 3, 2014 by pady_1

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Pick the Incorrect statement:

asked Jan 3, 2014 by pady_1

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1. Distinctive Characteristics exhibited by organisms are:

asked Jan 3, 2014 by pady_1

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Trichoderma harzianum has proved a useful microorganism for :

asked Dec 21, 2013 by thanvigandhi_1

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Quercus species are the dominant component in :

asked Dec 21, 2013 by thanvigandhi_1

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The fleshy receptacle of syconus of fig encloses a number of :

asked Dec 20, 2013 by thanvigandhi_1

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Dry indehiscent single - seeded fruit formed from bicarpillary syncarpous inferior ovary is :

asked Dec 20, 2013 by thanvigandhi_1

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