Sudden and sharp change in individual and is directly inherited by the offspring is called:
1.Mutation
2.Adaptation
3.Heredity
4.Continuous variation
Posted Date:-2021-08-28 15:10:24
Superiority of heterozygote leads to:
1.Fixation of recessive allele
2.Fixation of dominant allele
3.Maintenance of both the alleles
4.Depression of inbreeding
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The chromosomal aberrations include:
1.Duplication or deficiency
2.Translocations or inversions
3.Multiplication or polyploidy
4.All of these
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The condition in which the pollen of a flower has no fertilizing effect on the stigma of the same flower is called:
1.Herkogamy
2.Dichogamy
3.Dicliny
4.Self-sterility
Posted Date:-2021-08-28 15:10:24
The DNA is made up of the following four bases:
1.A.T.G.E.
2.A.T.G.C.
3.A.T.U.C.
4.A.G.U.C.
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The edible part of the apple is:
1. Mesocarp and endocarp
2.Endosperm
3.Only mesocarp
4.Fleshy thalamus
Posted Date:-2021-08-28 15:10:24
The factor that determine the movement of solutes through a membrane is:
1.Concentration gradient
2.Molecular size
3.Charge and active transport
4.All the above
Posted Date:-2021-08-28 15:10:24
The fleshy edible part of the mango fruit is:
1.Epicarp
2.Endocarp
3.Mesocarp
4.Pericarp
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The fleshy food storage tissue lying immediately with in perisperm is called:
1.Endosperm
2.Testa
3.Cruncle
4.None of the above
Posted Date:-2021-08-28 15:10:24
The following character in human beings can explain the sex linked inheritance:
1.Baldness
2.Eye colour
3.Haemophilia
4.Pattern of the hair
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The fruit of cumin or coriander is known as:
1.Lomentum
2.Cremocarp
3.Regma
4.Cypsela
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The main reason for the classification of plants is:
1.The difficulties arising in the study of plants because of their large number
2.Their mechanical separation
3.The nature of man
4.The environmental conditions
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Which of the following ions is involved in the opening and closing of stomata?
1.Mg2+
2.Fe2+
3.K+
4.Na+
Posted Date:-2021-08-28 15:10:24
Which of the following is sub-aerial modification of stem?
1.Corm
2.Stolon
3.Thorn
4.Bulb
Posted Date:-2021-08-28 15:10:24
Sterility incompatibility of distant crosses can e overcome to produce hybrids by:
1.Pollen culture
2.Anther culture
3.Explants culture
4.Embryo culture
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Stilt roots are produced from:
1.Maint root
2.Secondary roots
3.Stem and branches
4.None of above
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The botanical name of the onion is:
1.Allium sativum
2.Allum cepa
3.Pisum sativium
4.Tagetes erecta
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The commonest form of the ovule is:
1.Orthotropous
2.Anatropous
3.Amphilotropous
4.Campylotropous
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The evolutionary history of a species is referred as:
1.Phylogeny
2.Progeny
3.Organic evolution
4.Natural selection
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The first generation progeny of a hybrid are called:
1.Pure lines
2.Segregates
3.Parents
4.F1 plants
Posted Date:-2021-08-28 15:10:24
The following organelles also contain DNA:
1.Endoplasmic reticulum
2.Centrosomes
3.Vacuoles
4.Chloroplast
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The green expanded part of leaf is called as:
1.Leaf blade or lamina
2.Petiole
3.Petiole
4.Leaf base
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The jointed stem with solid nodes and hollow internodes is called:
1.Caudes
2.Culm
3.Scape
4.None of the above
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The life first originated in:
1.Air
2.Soil
3.Water
4.All of above
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The main patterns concerning origin and domestication of cultivated plant species are:
1.Mendelian variation
2.Inter-specific hybridization
3.Polyploidy
4.All of these
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Specific combining ability of the parents should be high in order to develop:
1.Hybrids
2.Composites
3.Varieties
4.Synthetics
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Spikelets are characteristic of the family:
1.Umbelliferae
2.Gramineae
3.Malvaceae
4.Leguminoceae
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Sporogenesis means:
1. Formation of zygote
2.Formation of embryo
3.Germination of seed
4.Development and formation of spores
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Stems often bear:
1.Unicellular hairs
2.Multicellular hairs
3.Both (a) & (b)
4.None of above
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Sterility is most pronounced in the F1 generation following:
1.Intervarietal hybridization
2.Intravarietal hybridization
3.Intraspecific hybridization
4. Interspecific hybridization
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Sunflower is:
1.Annual herb
2.Biennial herb
3.Perennial herb
4.None of the above
Posted Date:-2021-08-28 15:10:24
System of classification proposed by Hutchinson is:
1.Natural
2.Artificial
3.Phylogenetic
4.Numerical
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Tetraploid potato has 48 chromosomes whereas ordinary piploid species have _______ chromosomes:
1.34
2.24
3.14
4.10
Posted Date:-2021-08-28 15:10:24
The application of principles of genetics for the improvement of mankind is:
1.Herdity
2.Linkage
3.Population genetics
4.Eugenics
Posted Date:-2021-08-28 15:10:24
The attraction between two dissimilar molecules is:
1.Cohesion
2.Adhesion
3.Surface tension
4.None of the above
Posted Date:-2021-08-28 15:10:24
The basis on which evolution works is:
1.Simplicity
2.Complexity
3.Variations
4.Adaptation
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The best method to break the unfavourable linkage is:
1.Single seed descent method
2.Diallel selective mating
3.Pedigree method
4.Bulk method
Posted Date:-2021-08-28 15:10:24
The best method to carry forward the maximum number of genotypes/genes to the advanced generations against the force of natural selection is:
1.Pedigree method
2.Bulk method
3.Single seed descent method
4.Back cross method
Posted Date:-2021-08-28 15:10:24
The best-known artificial system of classification is that promulgated by:
1.Sir Julian Huxley
2.Bentham and Hooker
3.Linnaeus
4.A.P. Candolle
Posted Date:-2021-08-28 15:10:24
The branch of genetics concerned with the study of frequencies of mating populations is:
1.Quantitative genetics
2.Behavioural genetics
3.Population genetics
4.Eugenetics
Posted Date:-2021-08-28 15:10:24
The cell sap of cell A has an osmotic potential of -14 bars and turgor pressure of 4 bars. Cell B has a water potential of -16 bars and osmotic potential of -24 bars. The water movement will be:
1. From A to B
2.From B to A
3.No movement
4.None of the above
Posted Date:-2021-08-28 15:10:24
The chromosomes are attached to the spindle fibre by means of:
1.Pellicle
2.Telomere
3.Satellite body
4.Centromere
Posted Date:-2021-08-28 15:10:24
The components of synthetic population would have already been tested for:
1.SCA
2.Genetic advance
3.CGA
4.Both GCA & SCA
Posted Date:-2021-08-28 15:10:24
The condition in which the anthers and stigmas of a bisexual flower mature at the same time is known as:
1.Cleistogamy
2.Heterogamy
3.Syngamy
4.Homogamy
Posted Date:-2021-08-28 15:10:24
The definitive nucleus on fertilization gives:
1.Secondary
2.Zygote
3.Oospore
4.Primary endospermic nucleus
Posted Date:-2021-08-28 15:10:24
The diffusion of water through a differentially permeable membrane is called:
1.Osmosis
2.Imbibition
3.Diffusion
4.Water movement
Posted Date:-2021-08-28 15:10:24
The effect of the genotype of the pollen grain on the phenotype of the seed is termed as:
1.Apospory
2.Pollinia
3.Endopolyploidy
4.Xenia
Posted Date:-2021-08-28 15:10:24
The embroid (formed by vegetative cell) develops into a plant which in fact grows out of anther as in:
1.Tobacco
2.Wheat
3.Barley
4.Sorghum
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The fibrous fruit of coconut is dispersed by:
1.Air
2.Water Potential
3.Animals
4.None of the above
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The first easily observed sign of a water deficit in a plant is decrease in the tugor of its:
1.Root hairs
2.Stem cells
3.Xylem vessels
4.Leaf cells
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The first inbreeding experiments with maize were those reported by:
1.Sprengel in 1866
2.Darwin in 1876
3.Sprague in 1886
4.Baird 1896
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The flattened lateral outgrowth of the stem or the branch developing exogenously from a node and having a bud in its axil as known as:
1.Tendril
2.Thorn
3.Leaf
4.Flower
Posted Date:-2021-08-28 15:10:24
The following part of the chromosome is responsible for the movement of chromosome/chromatid to different poles:
1.Chromatin
2.Centromere
3.Chromomere
4.Satellite
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The fruit of Acacia is:
1.Lomentum
2.Double samara
3.Regma
4.Cypsela
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The fruits of cucurbitaceae is:
1.Pepo
2.Pome
3.Berry
4.Drupe
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The fusion of a male gamete with two polar nuclei is often termed:
1.Fertilization
2.Syngamy
3.Triple fusion
4.Pollination
Posted Date:-2021-08-28 15:10:24
The genes that intensify or diminish the effect of major genes are known as factors:
1.Modifying
2.Nullifying
3.Nullifying
4.None of these
Posted Date:-2021-08-28 15:10:24
The group of plants which bear flowers and seeds are known as:
1.Crytogams
2.Phanerogams
3.Pteridophyta
4.None of the above
Posted Date:-2021-08-28 15:10:24
The haploid phase in plants is called :
1.Sporophyte
2.Gametophyte
3.Zygote
4.None of the above
Posted Date:-2021-08-28 15:10:24
The hydrophytes float on water because of the presence of:
1.Aerenchyma
2.Aerenchyma
3.Aerenchyma
4.Sclerenchyma
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The inflorescence of banana is known as:
1.Catkin
2.Raceme
3.Spike
4.Spadix
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The initial gene pool of a synthetic population is composed of:
1.Plants from an open-pollinated variety
2.Pure lines
3.Inbred lines
4.Isolines
Posted Date:-2021-08-28 15:10:24
The initial pool of a composite population is composed of:
1.Inbred lines
2.Isoline
3.Pure lines
4.Single plants derived from crosses and/or germplasm lines
Posted Date:-2021-08-28 15:10:24
The life-cycle of an angiosperm is consist of:
1.Sporophytic stage
2. Gametophytic stage
3.Both stages
4.None of the above
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The main body of ovule is called:
1.Hilum
2.Chalaza
3.Nucellus
4.Integuments
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When the pistil has all the carpals united together it is said to be:
1.Apocarpous
2.Syncarpous
3.Simpler types
4.None of the above
Posted Date:-2021-08-28 15:10:24
Which of the following is not xerophytic plant?
1.Aloe
2.Cacti
3.Gum tree
4.Mango
Posted Date:-2021-08-28 15:10:24
Which of the following is ploidy level of common wheat?
1.Tetraploid
2.Hexaploid
3.Diploid
4.Octaploid
Posted Date:-2021-08-28 15:10:24
Which of the following leads to the cross-pollination?
1.Unisexuality
2.Dichogamy
3.Heterostyly
4.All the above
Posted Date:-2021-08-28 15:10:24
Which of the following material makes the protein chain?
1.Carbohydrates
2.Sugars
3.Fatty acids
4.Aminoacids
Posted Date:-2021-08-28 15:10:24