Sudden and sharp change in individual and is directly inherited by the offspring is called:
1.Mutation
2.Adaptation
3.Heredity
4.Continuous variation
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
The chromosomal aberrations include:
1.Duplication or deficiency
2.Translocations or inversions
3.Multiplication or polyploidy
4.All of these
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
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.
The edible part of the apple is:
1. Mesocarp and endocarp
2.Endosperm
3.Only mesocarp
4.Fleshy thalamus
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
The fleshy edible part of the mango fruit is:
1.Epicarp
2.Endocarp
3.Mesocarp
4.Pericarp
The fleshy food storage tissue lying immediately with in perisperm is called:
1.Endosperm
2.Testa
3.Cruncle
4.None of the above
The following character in human beings can explain the sex linked inheritance:
1.Baldness
2.Eye colour
3.Haemophilia
4.Pattern of the hair
The fruit of cumin or coriander is known as:
1.Lomentum
2.Cremocarp
3.Regma
4.Cypsela
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
Which of the following ions is involved in the opening and closing of stomata?
1.Mg2+
2.Fe2+
3.K+
4.Na+
Which of the following is sub-aerial modification of stem?
1.Corm
2.Stolon
3.Thorn
4.Bulb
Sterility incompatibility of distant crosses can e overcome to produce hybrids by:
1.Pollen culture
2.Anther culture
3.Explants culture
4.Embryo culture
Stilt roots are produced from:
1.Maint root
2.Secondary roots
3.Stem and branches
4.None of above
The botanical name of the onion is:
1.Allium sativum
2.Allum cepa
3.Pisum sativium
4.Tagetes erecta
The commonest form of the ovule is:
1.Orthotropous
2.Anatropous
3.Amphilotropous
4.Campylotropous
The evolutionary history of a species is referred as:
1.Phylogeny
2.Progeny
3.Organic evolution
4.Natural selection
The first generation progeny of a hybrid are called:
1.Pure lines
2.Segregates
3.Parents
4.F1 plants
The following organelles also contain DNA:
1.Endoplasmic reticulum
2.Centrosomes
3.Vacuoles
4.Chloroplast
The green expanded part of leaf is called as:
1.Leaf blade or lamina
2.Petiole
3.Petiole
4.Leaf base
The jointed stem with solid nodes and hollow internodes is called:
1.Caudes
2.Culm
3.Scape
4.None of the above
The life first originated in:
1.Air
2.Soil
3.Water
4.All of above
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
Specific combining ability of the parents should be high in order to develop:
1.Hybrids
2.Composites
3.Varieties
4.Synthetics
Spikelets are characteristic of the family:
1.Umbelliferae
2.Gramineae
3.Malvaceae
4.Leguminoceae
Sporogenesis means:
1. Formation of zygote
2.Formation of embryo
3.Germination of seed
4.Development and formation of spores
Stems often bear:
1.Unicellular hairs
2.Multicellular hairs
3.Both (a) & (b)
4.None of above
Sterility is most pronounced in the F1 generation following:
1.Intervarietal hybridization
2.Intravarietal hybridization
3.Intraspecific hybridization
4. Interspecific hybridization
Sunflower is:
1.Annual herb
2.Biennial herb
3.Perennial herb
4.None of the above
System of classification proposed by Hutchinson is:
1.Natural
2.Artificial
3.Phylogenetic
4.Numerical
Tetraploid potato has 48 chromosomes whereas ordinary piploid species have _______ chromosomes:
1.34
2.24
3.14
4.10
The application of principles of genetics for the improvement of mankind is:
1.Herdity
2.Linkage
3.Population genetics
4.Eugenics
The attraction between two dissimilar molecules is:
1.Cohesion
2.Adhesion
3.Surface tension
4.None of the above
The basis on which evolution works is:
1.Simplicity
2.Complexity
3.Variations
4.Adaptation
The best method to break the unfavourable linkage is:
1.Single seed descent method
2.Diallel selective mating
3.Pedigree method
4.Bulk method
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
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
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
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
The chromosomes are attached to the spindle fibre by means of:
1.Pellicle
2.Telomere
3.Satellite body
4.Centromere
The components of synthetic population would have already been tested for:
1.SCA
2.Genetic advance
3.CGA
4.Both GCA & SCA
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
The definitive nucleus on fertilization gives:
1.Secondary
2.Zygote
3.Oospore
4.Primary endospermic nucleus
The diffusion of water through a differentially permeable membrane is called:
1.Osmosis
2.Imbibition
3.Diffusion
4.Water movement
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
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
The fibrous fruit of coconut is dispersed by:
1.Air
2.Water Potential
3.Animals
4.None of the above
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
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
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
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
The fruit of Acacia is:
1.Lomentum
2.Double samara
3.Regma
4.Cypsela
The fruits of cucurbitaceae is:
1.Pepo
2.Pome
3.Berry
4.Drupe
The fusion of a male gamete with two polar nuclei is often termed:
1.Fertilization
2.Syngamy
3.Triple fusion
4.Pollination
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
The group of plants which bear flowers and seeds are known as:
1.Crytogams
2.Phanerogams
3.Pteridophyta
4.None of the above
The haploid phase in plants is called :
1.Sporophyte
2.Gametophyte
3.Zygote
4.None of the above
The hydrophytes float on water because of the presence of:
1.Aerenchyma
2.Aerenchyma
3.Aerenchyma
4.Sclerenchyma
The inflorescence of banana is known as:
1.Catkin
2.Raceme
3.Spike
4.Spadix
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
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
The life-cycle of an angiosperm is consist of:
1.Sporophytic stage
2. Gametophytic stage
3.Both stages
4.None of the above
The main body of ovule is called:
1.Hilum
2.Chalaza
3.Nucellus
4.Integuments
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
Which of the following is not xerophytic plant?
1.Aloe
2.Cacti
3.Gum tree
4.Mango
Which of the following is ploidy level of common wheat?
1.Tetraploid
2.Hexaploid
3.Diploid
4.Octaploid
Which of the following leads to the cross-pollination?
1.Unisexuality
2.Dichogamy
3.Heterostyly
4.All the above
Which of the following material makes the protein chain?
1.Carbohydrates
2.Sugars
3.Fatty acids
4.Aminoacids