A pollen grain is best defined as
(a) Partially developed embryo
(b) Partially developed male gametophyte
(c) Spore mother cell
(d) Male sperm cell
An orthodox seed can
(a) Tolerate dehydration and freezing
(b) Tolerate dehydration but not freezing
(c) Tolerate freezing but not dehydration
(d) None of these
A plant spore mother cell has 12 chromosomes, how many chromosomes will be there in it’s endosperm
(a) 6
(b) 18
(c) 12
(d) 24
Connective tissue cells that secrete antibodies are termed as
(a) Fibroblasts
(b) Mast cells
(c) Plasma cells
(d) Chromatophores
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Chiasmata was first discovered by
(a) Morgan in Drosophilla
(b) Beadle in Neurospora
(c) Janssen in amphibians
(d) Hammerling in Acetabularia
What initiate signals that are eventually felt as sensation of warmth, coolness, pain and itching?
(a) Free nerve endings
(b) Meissner corpusdes
(c) Merkel’s disc
(d) All the above
The disease burning feet syndrome is caused due to the deficiency of
(a) Riboflavin
(b) Pantothenic acid
(c) Floic acid
(d) Biotin
Which of the following statement is right
(a) All plants are totipotent
(b) All animals are totipotent
(c) Both of them
(d) None of them
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‘Materialistic theory’ of origin of life was proposed by
(a) Miller
(b) Oparin
(c) Richter
(d) Haeckel
Jumping genes were discovered by
(a) Mcclintock and Creighton
(b) Avery, Mcleod and Mccarthy
(c) Hedges and Jacob
(d) Lederberg and Tatum
Which of the following are photosynthetic units?
(a) Quantasomes
(b) Oxysomes
(c) Phycobilinosome
(d) F1 particles
In producing movement, which of the following structure functions as fulcrum
(a) Bone
(b) Muscle belly
(c) Joint
(d) Tendon
Anthesis is
(a) Opening of flower bud
(b) Pollen mother cell undergoing meiosis
(c) Dehiscene of anthers
(d) Stigma becoming receptive
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Deficiency of potassium in plants causes
(a) Increased apical dominance
(b) Decreased apical dominance
(c) Increased monopodial growth
(d) Increased secondary growth
The ultimate force which propels water against the gravity is generated by
(a) Osmosis
(b) Imbibition
(c) Transpiration
(d) ATP-hydrolysis
What is the total gain of energy during anaerobic respiration?
(a) One molecule of ATP
(b) Two molecules of ATP
(c) Four molecules of ATP
(d) Eight molecules of ATP
Crus commune is the part of Membranous Labyrinth where
(a) Endolymphatic duct joins
(b) Anterior and posterior semicircular canals join
(c) Organ of Corti joins
(d) Cochlear canal joins
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Embryophyta includes
(a) Angiosprms only
(b) All the plants except thallophyta
(c) Algae and fungi
(d) Bryophyta and pteridophyta
In Spiroyra the chloroplast is
(a) Left handed (sinistral) with wavy or smooth margin
(b) Right handed (dextral) with wavy margin
(c) Double helical with wavy margin
(d) Band shaped with smooth margin
Why a single mycelium of Albugo is capable of self fertilization ? Because it is
(a) Dichogamous
(b) Monoecious
(c) Homothallic and self compatible
(d) Homothallic and self incompatible
Peripatus is a connecting link between
(a) Annelids and mollusks
(b) Annelids and helminthes
(c) Annelids and arthropods
(d) Reptiles and mammals
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How many realms are there in the biogeographical map of the world?
(a) Four
(b) Five
(c) Six
(d) Many
Sori of Pteris and Pteridium are
(a) Continuous and linear
(b) Discontinuous and circular
(c) Discontinuous and reniform
(d) Discontinuous and vermiform
Morphollaxis is
(a) Reconstriction of the whole body
(b) Growth of the lost limb
(c) Healing of injury
(d) Regeneration with the help of blastema
Banana bunchy top is caused by
(a) Mycoplasma
(b) Deuteromycetes
(c) Xanthomonas
(d) Virus
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A mesokaryote organism among the followoing is
(a) Blue green alga
(b) yeast
(c) Acetabularia
(d) E.coli
The famous ‘Chipko Movment’ was started by
(a) Bahuguna
(b) Rajeev Gandhi
(c) Indira Gandhi
(d) Salim Ali
Formation of 50 zygotes in a tobacco plant, the minimum number of meiosis involved will be
(a) 59
(b) 63
(c) 109
(d) 99
The mildest stimulants is
(a) Amphetamines
(b) Caffeine
(c) Cocaine
(d) Charas
Modified antibiotics are manufactured by the technique of
(a) Ultrafiltration
(b) Ultracentrifugation
(c) Vernalization
(d) Genetic Engineering
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IR-36 was developed through breeding
(a) Six rice varieties and Oryza nivara
(b) 13 rice varieties and Oryza nivara
(c) Oryza indica and Oryza nivara
(d) Oryza indica and Oryza sativa
In human beings a male child showing Down’s syndrome has been produced. What is the condition of his sex chromosomes
(a) XX
(b) XY
(c) XO
(d) XXY
Addition of the new cell wall material in the existing one is
(a) Deposition
(b) Apposition
(c) Intussuception
(d) Aggregation
The process by which the segregation of mendelian factors takes place is
(a) Hybridization
(b) Mitosis
(c) Meiosis
(d) Breeding
What structures are present in the small intestine of man?
(a) Crypts of Lieberkutin
(b) Lacteal
(c) Peyer’s patches
(d) All the above
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Genetic drift is change in
(a) Gene frequency from one generation to other
(b) Gene frequency in the same generation
(c) Recessive gene
(d) None of the above
Larger molecules (bulk flow) are taken into the cell by
(a) Osmosis
(b) Pinocytosis
(c) Pinocytosis and phagocytosis
(d) Phagacytosis
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Islets of langerhans producing insulien are found in
(a) Liver
(b) Spleen
(c) Pancreas
(d) Pituitary
Contractile vacuoles in Chlamydomonas are meant for
(a) Storage of water
(b) Osmoregulation
(c) Maintenance of turgor pressure
(d) All of these
The conidiophores of Albugo are
(a) Club shaped and branched
(b) Clavate and unbranched
(c) Peltate and branched
(d) Peltate and unbranched
Natural selection theory was proposed by Drawin along with
(a) Wallace
(b) Mendel
(c) Morgan
(d) Lamarck
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Glossiona plapalis is a vector for
(a) Dengue
(b) Filariasis
(c) Gambian fever
(d) Plague
