Recent questions tagged botany

With regard to biological nitrogen fixation by Rhizobium in association with Soyabean, one of the following statements does not hold true.

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Which one of the following will not directly affect transpiration?

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Desmosomes are

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What does A,B and C represent in the given diagram of the chromosome?

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Which of the following statements is not true for plasma membrane?

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A common characteristic feature of plant sieve tube cells and most of the Mammalian erythrocytes is

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Assertion: A vascular cambium is considered as lateral. Reason: It gives rise to lateral roots.

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A transverse section of the stem is stained first with the safranin and then with fast green following the usual schedule of double staining for the preparation of a permanent slide. What would be the colour of the stained xylem and phloem?

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Select the mismatched pair

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How many plants in the list given below have composite fruits that develop from an inflorescence: Walnut, Poppy, Raddish, Fig, Pineapple, Apple, Tomato, Mulberry

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Rearrange the following zones as seen in the root in the vertical section and choose the correct option.Root hair zone B. Zone of meristems C. Root cap zone D. Zone of maturation E. Zone of elongation

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Protonema is

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If the chromosome number of a flowering plant is 36. What would be its in endosperm.

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Fusion of two gametes that are dissimilar in size are termed as

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A prothallus is

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Which of the following statements about Mycoplasma is wrong?

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Dodo, passenger pigeon and Stellar’s cow became extinct in the last 500 years due to

asked Jan 4, 2017 by meena.p

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Lions are found in

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Which of the following is considered as a pioneer community in xerarch?

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Term “Ecosystem” was coined by

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A protozoan reproduces by binary fission. What will be the number of protozoans in its population after six generations?

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Percentage of individuals of a given age group in a given population is called

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Which one of the following options is correct?

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In plant tissue culture, cytokinins are responsible for the growth of

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Totipotency refers to

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First artificial hybrid was obtained by crossing sweet William and Carnation in 1717 by

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Which one of the following is most appropriate for sickle cell anaemia?

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Match column I with column II and select the correct option from the codes given below.

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Which of the phenomenon was proved experimentally byMesselson and Stahl?

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In a dihybrid cross, igf you get $9:3:3:1$ ratio it denotes that

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Given diagram shows a pair of homologus chromosomes during meiosis Maximum crossing over will occur between genes

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Which of the following characters was not chosen by Mendel?

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The study of formation, growth and development of a new individual from an egg is known as

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Persistant nucellus is called __ and is found in

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Even in the absence of pollinating agent, seed setting is assured in

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Vegetative propagation in mint occurs by

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Oestrous cycle is found in

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Maryland Mammoth tobacco is a short day plant. Its critical duration of darkness is $10 hour$ . Under which of the following conditions will it not flower?

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Choose the correct statement

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Assertion: In $C_4$ plants, photorespiration does not occur Reason: $C_4$ plants have a mechanism that increases the concentration of $CO_2$ at enzyme site.

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Which metal ion is a constituent of chlorophyll?

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Deficiency symptoms of an element tend to appear first in young leaves. It indicates that the element is relatively immobile. Which one of the following elemental deficiency would show these symptoms?

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Which of the following does not apply to reverse osmosis?

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Given diagram shows variation in the amount of DNA of a developing eukaryote. What does the arrow denote?

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Non membrane bound cell organelle is

asked Jan 3, 2017 by meena.p

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Glycocalyx of a bacterial cell may occur in the form of a loose sheath called _ or it may be thick and tough called .

asked Jan 3, 2017 by meena.p

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Ribozyme was first discovered by

asked Jan 3, 2017 by meena.p

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What is common between chloroplast, chromoplast and leucoplast?

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Plants showing anamolous secondary growth include

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Assertion: A simple tissue is made up of only one type of cell. Reason: Various simple tissues in plants are parenchyma, collenchymas and sclerenchyma.

asked Jan 3, 2017 by meena.p

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