Recent questions tagged botany

Ecotone is

asked Jan 23, 2017 by meena.p

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The density of a population in a given habitat during a given period, fluctuates due to changes in the certain basic processes. On this basis, fill up the boxes A and B in the flow chart with correct option

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Several plant and animal species present together at a place constitute a

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Somaclones are

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A somatic hybrid between potato and a tomato is named as

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The Nobel laureate who developed semi dwarf wheat varieties in Mexico was

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First code of every mRNA is

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Assertion: The sugar phosphate backbone of two chains in DNA double helix shows ani parallel polarity. Reason: The PDE bonds in one strand goes from a 3’carbon of one nucleotide to a 5’carbon of adjacent nucleotide, whereas those in complementary strand go vice versa.

asked Jan 23, 2017 by meena.p

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The fully processed hnRNA is called _(i)_ and is transposed out of (ii) into (iii)_ for translation

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Assertion: Phenyl pyruvic acid is excreted through urine in the case of phenyl ketonuria. Reason: The affected individual lacks enzyme phenyl alanine hydroxylase

asked Jan 23, 2017 by meena.p

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One of the parents of a cross has mutation in its mitochondria. In that cross, that parent is taken as a male. During segregation of F2 progenies that mutation is found in

asked Jan 23, 2017 by meena.p

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True breeding red eyed Drosophila flies with plain thaxes were crossed with pink eyed flies with striped thoraxes.Red eyed plain thorax X Pink eye striped thorax., the $F_1$ flies were then test crossed against double recessive. The following $F_2$ generation resulted from the cross.What percentage of recombinants resulted from the rest cross:

asked Jan 23, 2017 by meena.p

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The outermost and innermost wall layers of microsporangium in an anther respectively

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This plant flowers once in 12 years. During September-October 2006, its mass flowering transformed large tracts of hilly areas in kerala, Karnataka and Tamilnadu into blue strtches and attracted a large number of tourists . this plant is

asked Jan 23, 2017 by meena.p

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An ovule which becomes curved so that the nucellus and the embryo lie at right angles to the funicle is

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If a plant fails to develop viable seeds, it would be grown by

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Which of the following has the longest life span?

asked Jan 23, 2017 by meena.p

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Cytokinins help to produce all except

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Gaseous exchange in submerged hydrophytes takes place through

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Select the incorrect pair:

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For yielding one molecule of glucose, the Calvin cycle turns

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Match the element with its associated functional roles and choose the correct option among the ones given below:

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The chief conducting element of xylem in gymnosperms are:

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Select the correct statement about G1 phase:

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Which of the following is the best way to separate intact chloroplast from green leaves of angiospermic plant?

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Digestive enzymes hydrolases are present in

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The stain used to visualize mitochondria is

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Different cells have different sizes. Arrange the following cells in an ascending order of their size. Choose the correct option among the following: i. Mycoplasma ii.Ostrich’s egg iii.Human RBC iv.Bacteria

asked Jan 23, 2017 by meena.p

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Assertion: Apical meristems and intercalary meristems are primary meristems Reason: Both of these meristems appear early in the life of a plant and help in the formation of the primary plant body

asked Jan 23, 2017 by meena.p

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Epiblema of roots is equivalent to

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The floral diagram and formula is that of

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Pneumatophores are present in

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Batrechospermum is a

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Identify the given figures of algae and Select correct option

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Major photosynthetic pigments in green algae are

asked Jan 23, 2017 by meena.p

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Select the incorrect apir:

asked Jan 19, 2017 by meena.p

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With respect to fungal sexual cycle, choose the correct sequence of events.

asked Jan 19, 2017 by meena.p

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First step in taxonomy is

asked Jan 19, 2017 by meena.p

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Red data book deals with

asked Jan 18, 2017 by meena.p

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Bandipur National Park runs a project for

asked Jan 18, 2017 by meena.p

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Which one has a maximum biomass?

asked Jan 18, 2017 by meena.p

3 answers

Out of the total cost of ecosystem service proposed, cost of climate regulation and habitat for wild life are:

asked Jan 18, 2017 by meena.p

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During the process of decomposition

asked Jan 18, 2017 by meena.p

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Assertion: Prolonged interspecific competition causes an increase in the size of the niche of a population Reason: In such a population, use of new type of resource will increase through generations.

asked Jan 18, 2017 by meena.p

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Parameters related to age structure include

asked Jan 18, 2017 by meena.p

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A place has very scanty rainfall, the dominant plants may be

asked Jan 18, 2017 by meena.p

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Hormone responsible for the growth of root in micro propagation is

asked Jan 18, 2017 by meena.p

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Which of the following as to be used as an explants to generate a disease free plant

asked Jan 18, 2017 by meena.p

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A wheat variety Atlas 66, which has been used as a donor for improving cultivated wheat is rich in

asked Jan 18, 2017 by meena.p

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While analysing the DNA of an organism , a total number of 5386 nucleotides were found out which the proportion of different bases were $Adenine-29 \%, Guanine-17 \%, Cytosine-32\%,Thymine-17\%$. Considering Chargaff’s rule, it can be concluded that

asked Jan 18, 2017 by meena.p

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