Recent questions tagged botany

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

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The recessive genes located on X-chromosomes in humans are always-

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Viruses that infect bacteria, multiply and cause their lysis are called -

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Extranuclear inheritance is a consequence of presence of genes in -

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In$ C_3$ plants, the first stable product of photosynthesis during the dark reaction is :-

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During transcription, if the nucleotide sequence of the DNA strand that is being coded is ATACG, then the nucleotide sequence in the mRNA would be -

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Anthesis is a phenomenon which refers to -

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A normal woman, whose father was colour-blind is married to a normal man. The sons would be :-

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The richest sources of vitamin B12 are :-

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The aleurone layer in maize grain is specially rich in :-

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Genetic Map is one that : -

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Gray spots of oat are caused by deficiency of : -

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Coconut milk factor is : -

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Which one of the following triplet codes, is correctly matched with its specificity for an amino acid in protein synthesis or as 'start' or 'stop' codon : -

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Species are considered as :-

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Which one of the following pairs of plants are not seed producers : -

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Which one of the following statements about viruses is correct : -

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Sexual reproduction in Spirogyra is an advanced feature because it shows : -

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Phenetic classification is based on : -

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In alcohol fermentation : -

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Mycorrhiza is an example of :-

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Tobacco mosaic virus is a tubular filament of size : -

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Which one of the following is categorised under living fossils : -

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Boron in green plants assists in : -

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Chlorenchyma found in : -

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Plants reproducing by spores such as mosses and ferns are grouped under the general term : -

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Which one pair of examples will correctly represent the grouping Spermatophyta according to one of the schemes of classifying plants : -

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Which of the following plants are used as green manure in crop fields and in sandy soils : -

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In which kingdom would you classify the archaea and nitrogen-fixing organism, if the five-kingdom system of classification is used :

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Nicotiana sylvestris flowers only during long days and N. tabacum flowers only during short days. If raised in the laboratory under different photoperiods, they can be induced to flower at the same time and can be cross-fertilized to produce self-fertile offspring. What is the best reason for considering N. sylvestris and N. tabacum to be separate species : -

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Which fractions of the visible spectrum of solar radiations are primarily absorbed by carotenoids of the higher plants :-

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Juicy hair-like structure observed in the lemon fruit develop from :-

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Biosystematics aims at :-

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The apical meristem of the root is present

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Diffuse porous wood is characteristics of those plants which are growing in :-

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In which one of the following nitrogen is not a constiuent :

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Which one of the following is wrong in relation to photorespiration :-

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Plants deficient of element zinc, show its effect on the biosynthesis of plant growth hormone-

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Stomata of a plant open due to : -

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In sugarcane plant $^{14}CO_2$ is fixed in malic acid, in which the enzyme that fixes $CO_2$ is :-

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The cells of the quiescent centre are characterised by : -

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Differentiation of shoot is controlled by : -

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In a flowering plant, archesporium gives rise to : -

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Stomata of CAM plants : -

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Which one of the following mineral elements plays an important role in biological nitrogen fixation : -

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The major portion of the dry weight of plants comprises of : -

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Which element is located at the centre of the porphyrin ring in chlorophyll : -

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The major role of minor elements inside living organisms is to act as : -

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Which one of the following concerns photophosphorylation : -

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During anaerobic digestion of organic waste, such as in producing biogas, which one of the following is left undergraded : -

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