Q1.Turpentine is obtained from
Exp. Turpentine (also called spirit of turpentine, oil of turpentine, wood turpentine and colloquially turps) is a fluid obtained by the distillation of resin from live trees, mainly pines. It is mainly used as a solvent and as a source of materials for organic synthesis.
Q2. The metal ion involved in Stomatal regulations is
Exp. Each stomata has two dumb-bell or kidney shaped cells (depending on the plant type) called guard cells surrounded by a few specialised epidermal cells called subsidiary cells. The opening and closing of stomatal aperture is regulated by turgidity of guard cells which is brought about by entry/exit of K+ ions.
Q3. Which one of the following is concerned with the production of ATP molecules?
Exp.Most of the ATP produced by aerobic cellular respiration is made by oxidative phosphorylation. … Biology textbooks often state that 38 ATP molecules can be made per oxidised glucose molecule during cellular respiration (2 from glycolysis, 2 from the Krebs cycle, and about 34 from the electron transport system).
Q4. Match List I correctly with List II and select your answer using the codes given below:List-I
B. Yeast fixation
C. Penicillium protein
3. Single cell
A. A-3, B-1, C-4, D-2
B. A-1, B-3, C-4, D-2
C. A-2, B-4, C-1, D-3
D. A-3, B-4, C-1, D-2
Exp. Chlorella is a genus of single-celled green algae belonging to the division Chlorophyta. It is spherical in shape, about 2 to 10 μm in diameter, and is without flagella. Chlorella contains the green photosynthetic pigments chlorophyll-a and -b in its chloroplast. Rhizobium is a genus of Gram-negative soil bacteria that fix nitrogen. Rhizobium species form an endosymbiotic nitrogen-fixing association with roots of legumes and Parasponia. Penicillium ascomycetous fungi are of major importance in the natural environment as well as food and drug production. Some members of the genus produce penicillin, a molecule that is used as an antibiotic, which kills or stops the growth of certain kinds of bacteria.
Q5. The ratio 3 : 1 is obtained in
A. dihybrid cross
B. monohybrid cross
C. crossing over
Exp.A monohybrid cross is a genetic mix between two individuals who have homozygous genotypes, or genotypes that have completely dominant or completely recessive alleles, which result in opposite phenotypes for a certain genetic trait.
Q6. Consider, the following statements:
Assertion (A) : Rhizopus lives on bread
Reason (R) : Because it is a parasite.
Now select your answer using the codes given below:
A. Both A and R are true, and R is the correct explanation of A
B. Both A and R are true, but R is not the correct explanation of A
C. A is true, but R is false
D. A is false, but R is true
Exp. Additional info: Rhizopus is a genus of common saprophytic fungi on plants and specialized parasites on animals. They are found on a wide variety of organic substances , including “mature fruits and vegetables”, jellies, syrups, leather, bread, peanuts, and tobacco.
Q7. Which of the following is NOT correctly matched?
A.Auxin enlargement – Cell
B.Gibberellin synthesis – Amylase
C.Cytokinin – ageing promotes
D.Ethylene – Fruit ripening
Exp.Ethylene is an important industrial organic chemical. It is produced by heating either natural gas, especially its ethane and propane components, or petroleum to 800–900 °C (1,470–1,650 °F), giving a mixture of gases from which the ethylene is separated.
Q8. Coralloid roots are found in
Exp.The coralloid roots contain symbiotic cyanobacteria (blue-green algae), which fix nitrogen and, in association with root tissues, produce such beneficial amino acids as asparagine and citrulline.
Q9. Pulses contain large amount of
Q10.Which one is a Xerophyte?
Exp.A xerophyte is a species of plant that has adaptations to survive in an environment with little liquid water, such as a desert or an ice- or snow-covered region in the Alps or the Arctic. Popular examples of xerophytes are cacti, pineapple and some Gymnosperm plants.
Q11. Which of the following diseases is NOT caused by bacteria?
Exp.Influenza, commonly known as the flu, is an infectious disease caused by an influenza virus. Symptoms can be mild to severe. The most common symptoms include: high fever, runny nose, sore throat, muscle pains, headache, coughing, sneezing, and feeling tired.
Q12. Which one of the following is correctly matched?
C.Robert Gallo-Tobacco Mosaic virus
D.Dmitry Ivanovsky-Discovery of virus
Exp.In 1892, Dmitry Ivanovsky used one of these filters to show that sap from a diseased tobacco plant remained infectious to healthy tobacco plants despite having been filtered. Martinus Beijerinck called the filtered, infectious substance a “virus” and this discovery is considered to be the beginning of virology.
Q13. Gymnosperms are
A. Closed seeded plants
B. Open seeded plants
C. Seedless plants
D. Herbaceous plants
Exp.The gymnosperms, also known as Acrogymnospermae, are a group of seed-producing plants that includes conifers, cycads, Ginkgo, and gnetophytes.
Q14. Reduction division is
C. Nuclear division
Exp.Meiosis: a type of cell division that results in four daughter cells each with half the number of chromosomes of the parent cell, as in the production of gametes and plant spores.
Q15. The female sex organ of polytrichum is
Exp.In Polytrichum the male organs are much more conspicuous than the female organs. The sperm swim through a film of moisture on the plant’s surface to the female org- an, where the egg is then fertilised to form the sporophyte (not seen). This grows on a stalk on top of the gametophyte and produces new spores.
Q16. DNA model was first proposed by
A. Watson ana Paul
B. Watson and Crick
C. Robert Hooke
D. Robert Brown
Exp.In early 1953 he had published a paper where he proposed a triple-helical structure for DNA. Watson and Crick had also previously worked out a three-helical model, in 1951. But their theory was wrong.
Q17. Match List I correctly with List II and select your answer using the codes given below:
B. Golgi complex
1. Cellulose secretion
3. Metabolic activities
4. Protein Synthesis
A. A-3, B-1, C-4, D-2
B. A-2, B-3, C-4, D-1
C. A-2, B-1, C-4, D-3
D. A-4, B-3, C-2, D-1
Q18. Mendel did his hybridization experiments in this plant
A. Sweet pea plant
B. Pea plant
C. Tomato plant
D. Cotton plant
Exp.”Experiments on Plant Hybridization” is a seminal paper written in 1865 and published in 1866 by Gregor Mendel, an Augustinian friar considered to be the founder of modern genetics. The paper was the result after years spent studying genetic traits in Pisum sativum, the pea plant.
Q19. The Sun’s energy is fixed in the world by
C. Green plants
Exp.The original source of almost all energy in an ecosystem is the Sun. All of the energy the sun releases does not reach Earth. One one-billionth of the Sun’s total energy output actually reaches the Earth. Of all the energy that does reach Earth, slightly less than 34 percent is reflected back to space by clouds.
Q20. Fixation of nitrogen in the soil is done by
Exp.Nitrogen fixation is a process by which nitrogen in the air is converted into ammonia or related nitrogenous compounds. Atmospheric nitrogen is molecular dinitrogen, a relatively nonreactive molecule that is metabolically useless to all but a few microorganisms.
Q21. Plasmodium belongs to this group
Exp.Plasmodium is a genus of unicellular eukaryotes that are obligate parasites of vertebrates and insects. The life cycles of Plasmodium species involve development in a blood-feeding insect host which then injects parasites into a vertebrate host during a blood meal.
Q22. Genes are located on
Exp.The total complement of genes in an organism or cell is known as its genome, which may be stored on one or more chromosomes. A chromosome consists of a single, very long DNA helix on which thousands of genes are encoded. The region of the chromosome at which a particular gene is located is called its locus.
Q23. Select the correct answer in the life cycle of a bryophyte
A. Spores – Fertilization Sporo phyte – Gametophyte
B. Gametophyte – Sporophyte Gametes – Fertilization
C. Gametophyte -Sporophyte Spores – Fertilization
D. Sporophyte – Gameto-Sporesphyte – Fertilization
Q24. Which one of the following is correctly matched?
A. Tuberculosis – Fungus
B. Cholera – Bacterium
C. Mumps – acteriophage
D. Tetanus – Virus
Exp.Cholera is an infectious disease that causes severe watery diarrhea, which can lead to dehydration and even death if untreated. It is caused by eating food or drinking water contaminated with a bacterium called Vibrio cholerae.
Q25. The botanical name of Chikpea / Bengal gram is
A. Arachis hypogea
B. Pisum sativum
C. Cicer arietinum
D. Phaseolus mungo
Exp.The chickpea or chick pea (Cicer arietinum) is an annual legume of the family Fabaceae, subfamily Faboideae. Its different types are variously known as gram or Bengal gram, garbanzo or garbanzo bean, and Egyptian pea.
Q26. Select the correct order of stages in mitosis:
A. Metaphase, Prophase, Anaphase, Telophase
B. Prophase, Anaphase, Metaphase, Telophase
C. Prophase, Metaphase, Anaphase, Telophose
D. Prophase, Telophase, Anaphase, Metaphase
Exp.Mitosis Is Divided into Well-Defined Phases : Prophase. Mitosis begins with prophase, during which chromosomes recruit condensin and begin to undergo a condensation process that will continue until metaphase. …Prometaphase. …Metaphase. …Anaphase. …Telophase and Cytokinesis.
Q27. A pure breeding Dwarf pea plant (tt) on hybridization with a pure breeding tall plant (TT) will produce dwarf and tall plants in the ratio (in F2 generation) of
A. 1 : 3
B. 3 : 1
C. 1 : 2 : 1
D. 9 : 3 : 3 : 1
Q28. The male sex organ of Chara is called as
Exp. The sex organs are macroscopic and complex in organization. The male sex organs are called antheridium or globule and the female oogonium or nucule. Most of the Chara species are homothallic i.e., the male and male sex organs are borne on the same nodes, (Fig. 7) e.g., C. zeylanica.
Q29. Bacteria was first discovered by
A. Anton Van Leeuwenhoek
B. W. M.Stanley
D. Robert Gallo
Exp.Antony Leeuwenhoek was the first person to see bacteria. Through the late 1670s, he sent comprehensive data and detailed drawings of his sightings of bacteria and algae to the Royal Society in London. Throughout his lifetime Leeuwenhoek remained devoted to the scientific research and made several vital discoveries.
Q30. Which one of the following is correctly matched?
A. Gnetum – Gymnosperm
B. Polytrichum – Alga
C. Chara – Pteriodophyte
D. Selaginella – Bryophyte
Exp. Gnetum is a genus of gymnosperms, the sole genus in the family Gnetaceae and order Gnetales. They are tropical evergreen trees, shrubs and lianas. Unlike other gymnosperms, they possess vessel elements in the xylem.
Q31. Which one of the following tissues conducts food material in plants?
Exp.Phloem is the vascular tissue responsible for the transport of sugars from source tissues (ex. photosynthetic leaf cells) to sink tissues (ex. non-photosynthetic root cells or developing flowers). Other molecules such as proteins and mRNAs are also transported throughout the plant via phloem.
Q32. Pencillin is a / an
Exp.Penicillin is a group of antibiotics which include penicillin G, penicillin V, procaine penicillin, and benzathine penicillin. Penicillin antibiotics were among the first medications to be effective against many bacterial infections caused by staphylococci and streptococci.
Q33. The energy needed by the living organism is ultimately obtained from
Q34. In plants, water is conducted by
Exp. Xylem is one of the two types of transport tissue in vascular plants, phloem being the other. The basic function of xylem is to transport water from roots to stems and leaves, but it also transports nutrients.
Q35. Joint enzymes of DNA
A. RNA primers
D. Allo enzymes
Exp. In biochemistry, a ligase is an enzyme that can catalyze the joining of two large molecules by forming a new chemical bond, usually with accompanying hydrolysis of a small pendant chemical group on one of the larger molecules or the enzyme catalyzing the linking together of two compounds, e.g., enzymes that catalyze.
Q36. The weed which reached India as a contaminant of wheat imported ‘under PL480 scheme’ is
Exp. Parthenium is a genus of North American shrubs in the sunflower tribe within the daisy family. It reached India as a weed along with importation of Wheat several decades back.
Q37. Tobacco contains a poisonous substance called
Exp.Nicotine is a chemical that contains nitrogen, which is made by several types of plants, including the tobacco plant. It is also produced synthetically. Nicotiana tabacum, the type of nicotine found in tobacco plants, comes from the nightshade family.
Q38. Palaeo botany deals with the study of
A. Fozzil plants
C. Fozzil animals
D. Living plants
Exp. Paleobotany, also spelled as palaeobotany, is the branch of botany dealing with the recovery and identification of plant remains from geological contexts, and their use for the biological reconstruction of past environments (paleogeography), and the evolutionary history of plants, with a bearing upon the evolution of life in general.
Q39. The work ‘Biosphere’ means
A. total assembly of all living organisms
B. only plants of the world
C. only animals of the world
D. only microorganism of the world
Exp.The biosphere also known as the ecosphere, is the worldwide sum of all ecosystems. It can also be termed the zone of life on Earth, a closed system, and largely self-regulating.
Q40. Microbial world was discovered in the year
Exp.The existence of microscopic organisms was discovered during the period 1665-83 by two Fellows of The Royal Society, Robert Hooke and Antoni van Leeuwenhoek.
Q41. Gametophytes are
A. Haploid structures
B. Hamete producers
D. All the above
Exp.A gametophyte is one of the two alternating phases in the life cycle of plants and algae. It is a haploid multicellular organism that develops from a haploid spore that has one set of chromosomes. The gametophyte is the sexual phase in the life cycle of plants and algae.
Q42. Presence of a cambium indicates
A. open vascular bundle
B. closed bundle
C. incomplete vascular bundle
D. broken vascular bundle
Exp. Note: A cambium, in plants, is a tissue layer that provides partially undifferentiated cells for plant growth. It is found in the area between xylem and phloem. It forms parallel rows of cells, which result in secondary tissues.
Q43. The Phyllotaxy of Gnetum is
Exp. In botany, phyllotaxis or phyllotaxy is the arrangement of leaves on a plant stem. Phyllotactic spirals form a distinctive class of patterns in nature. The term was coined by Charles Bonnet to describe the arrangement of leaves on a plant.
Gnetum is a genus of gymnosperms, the sole genus in the family Gnetaceae and order Gnetales. They are tropical evergreen trees, shrubs and lianas. Unlike other gymnosperms, they possess vessel elements in the xylem.
Q44. Match List I correctly with List II and select your answer using the codes given below:
A. A-1, B-3, C-4, D-2
B. A-2, B-1, C-3, D-4
C. A-3, B-4, C-2, D-1
D. A-4, B-2, C-1, D-3
Q45. The sperm in Cycas is
A. biciliote and spirally coiled
B. biciliate and pyriform
C. top – shaped and multiciliate
D. top – shaped without cilia
Exp. Cycads, unlike other seed plants, have motile sperm. These are large, up to 300 µm in size. It germinates, the tube nucleus entering the pollen tube which grows through and parasitizes the megasporangium. The generative cell ultimately forms multiflagellate sperm cells.
Q46. Circinate venation of leaves is a typical character of
C. pteridophytes in general
Exp.Circinate vernation is the manner in which a fern frond emerges. … In the case of many fronds, long hairs or scales provide additional protection to the growing tips before they are fully uncoiled. Circinate vernation may also be observed in the extension of leaflets, in the compound leaves of Cycads.
Q47. All fungi are always
Exp. A heterotroph is an organism that cannot manufacture its own food by carbon fixation and therefore derives its intake of nutrition from other sources of organic carbon, mainly plant or animal matter. In the food chain, heterotrophs are secondary and tertiary consumers.
Q48. Why blue-green algae are called cyanobacteria?
A. because they are prokaryotic
B. because they live in waterly mediun
C. because they have blue colour
D. because they are unicellular organisms
Exp. Because they are photosynthetic and aquatic, cyanobacteria are often called “blue-green algae”. This name is convenient for talking about organisms in the water that make their own food, but does not reflect any relationship between the cyanobacteria and other organisms called algae.
Q49. The gymnosperms resemble angiosperms in having
A. ciliated sperms
B. presence of archegonia
C. presence of ovule
D. presence of monoxylic wood
Q50. The disease caused by the fungus Colletotrichum falcatum is known as
A. downy mildew
B. leaf curl
C. red rot
D. blight disease
Exp.Red rot is the most common disease of sugarcane, caused by the fungus Colletotrichum falcatum Went. It causes severe loss in yield and quality of the susceptible cultivars in the Indian sub- continent.
Q51. Dendrochronology is the study of
A. height of a tree
B. diameter of a tree
C. age of a tree with the help of annual rings
D. countin the number of branches
Exp. Dendrochronology (or tree-ring dating) is the scientific method of dating tree rings (also called growth rings) to the exact year they were formed.
Q52. Clove is obtained from which of the plants parts given below?
B. flower buds
Exp. Cloves are the aromatic flower buds of a tree in the family Myrtaceae, Syzygium aromaticum. They are native to the Maluku Islands (or Moluccas) in Indonesia, and are commonly used as a spice.
Q53. Match List I correctly with List II and select your answer using the codes given below:
A. A-4, B-3, C-2, D-1
B. A-3, B-4, C-1, D-2
C. A-1, B-3, C-4, D-2
D. A-2, B-1, C-3, D-4
Q54. Which of the algae given below grows sewage ponds?
Exp. Chlorella is a genus of single-celled green algae belonging to the division Chlorophyta. It is spherical in shape, about 2 to 10 μm in diameter, and is without flagella. Chlorella contains the green photosynthetic pigments chlorophyll-a and -b in its chloroplast.
Q55. Which of the plant groups mentioned below are popularly known as Amphibians of plant kingdom ?
Exp. Amphibians are those organisms which live on both land and in water. Bryophytes are called amphibians of the plant kingdom because these plants though live in soil but they need water for sexual reproduction. The sperm of bryophyte (antherozoids) are flagellate and need water to swim to the eggs.
Q56. DNA double helical structure was described for the first time by
A. Beadle and Tautum
C. Hargobind Khorana
D. Watson and Crick
Q57. Catalytically active enzyme is called
Exp. An apoenzyme is an inactive enzyme, activation of the enzyme occurs upon binding of an organic or inorganic cofactor. Holoenzyme- An apoenzyme together with its cofactor. A holoenzyme is complete and catalytically active.
Q58. Water droplets at the tip of the leaf are due to
A. Cuticular transpiration
B. Lenticular transpiration
C. Stomatal transpiration
Exp. Guttation is the exudation of drops of xylem sap on the tips or edges of leaves of some vascular plants, such as grasses, and a number of fungi. Guttation is not to be confused with dew, which condenses from the atmosphere onto the plant surface.
Q59. Match List I correctly with List II and select your answer using the codes given below:
A. A-2, B-1, C-4, D-3
B. A-3, B-4, C-1, D-2
C. A-4, B-3, C-2, D-1
D. A-1, B-2, C-3, D-4
Q60. The age of a tree can be determined by
A. measuring the height
B. masuring its girth
C. counting the annual growth rings
D. measuring its diameter
Q61. The name Traveller’s palm refers to
A. Cocos nucifera
B. Musa sapientum
C. Revenala madagas cariensis
Q62. Phyllode is seen in the plant
A. Acacia melanoxylon
B. Acacia orabica
C. Acocia concinna
D. Acacia sundra
Q63. Polyploids can be artificially induced by
B. cross – pollination
C. self – pollination
D. vegetative propagation
Q64. Parthenacarpy can be induced by
Q65. Raphanobrassica was discovered by
Q66. When FADH₂ is oxidised, the following number of ATP is produced
Q67. Half leaf experiment proves the essentiality of
Q68. The universal CO₂ acceptor molecule is called
D. Acetyl CoA
Q69. In anoxygenic photosynthesis, which of the following takes part as electron donors?
Q70. Velamen root is found in
Q71.Rosewood is obtained from
A. Dalbergia latifolia
B. Thespesia populnea
C. Mangifera indica
D. Delonix regia
Q72. Pencillin was invented by
A. J. Salk
C. Alexander Fleming
Q73. Spirulina which is a source of SCP is a
A. Blue green algae
B. Red algae
Q74. Chlorophyll is formed in the presence of
Q75. Hormone involved in phototropism is
Q76. Who is the father of Genetics ?
A. Gregor Mendel
B. Hugo devries
C. Robert Hooke
Exp.Gregor Johann Mendel was a scientist, Augustinian friar and abbot of St. Thomas’ Abbey in Brno, Margraviate of Moravia. Mendel was born in a German-speaking family in the Silesian part of the Austrian Empire and gained posthumous recognition as the founder of the modern science of genetics.
Q77. The main function of RNA is
A. carbohydrate synthesis
B. lipid synthesis
C. protein synthesis
D. no specific function
Exp.The main function of RNA is to carry information of amino acid sequence from the genes to where proteins are assembled on ribosomes (protein synthesis) in the cytoplasm. This is done by messenger RNA (mRNA). A single strand of DNA is the blueprint for the mRNA which is transcribed from that DNA strand.
Q78. An example of a Hesperidium is
Exp.Hesperidium type fruits are always covered with a leathery rind and the partitions separating their carpels are tough and fibrous. The orange, lemon and grapefruit, all members of the citrus family, are good examples of the hespiridium type of fruit.
Q79. Which of these is antibiotic?
D. All of these
Q80. The flow of genetic information from nucleic add to protein is called
A. processing of RNA
D. central dogma
Exp. Transcription is the first step in gene expression. It involves copying a gene’s DNA sequence to make an RNA molecule. Transcription is performed by enzymes called RNA polymerases, which link nucleotides to form an RNA strand (using a DNA strand as a template).
Q81. Mycoses are diseases caused by
Exp.The organisms that cause these diseases are called dermatophytes, the resulting diseases are often called ringworm, dermatophytosis or tinea. Dermatophytes only cause infections of the skin, hair, and nails, and are unable to induce systemic, generalized mycoses, even in immunocompromised hosts.
Q82. Which one of the following is NOT a correct pair in relation to function?
A.Golgi complex –breakdopwn of complex molecules
B.Mitochondria-Production of energy
C.Chromosomes-Vehicles of heredity
Q83. The parasitic algae is
Exp.Cephaleuros is a genus of parasitic thalloid green algae comprising approximately 14 species. Its common name is red rust. Specimens can reach around 10 mm in size. Dichotomous branches are formed.
Q84. Vessels means
A. Cell wall
C. Closed wall
D. Opened wall
Exp.A vessel element or vessel member (trachea) is one of the cell types found in xylem, the water conducting tissue of plants. Vessel elements (tracheae) are typically found in flowering plants (angiosperms) but absent from most gymnosperms such as conifers.
Q85. The fruiting body namely, Cleistothecium is formed in
Q86. If the genetic name of the fossil plant ends with dendron or xylon it denotes
A. the leaf of the fossil
B. the stem of the fossil
C. the rotten residues of the fossil
D. the reproductive part of a fossil
Q87. Sewage treatment is carried out with the help of
D. Blue green algae
Q88. Ikebana pertains to
A. Leaf arrangements
B. Floral arrangements
C. Plant arrangements
D. None of these
Q89. The first to isolate a plant virus is
A. W. M. Stanley
B. K. M. Smith
C. E. C. Stockmann
Q90. Oxygen in the universe is replinished by
A. higher plant photosynthesis
B. bacterial photosynthesis
C. photolysis of water
Exp.chemosynthesis is the biological conversion of one or more carbon-containing molecules and nutrients into organic matter using the oxidation of inorganic compounds or methane as a source of energy, rather than sunlight, as in photosynthesis.
Q91. In plants, the radial transport of food, water and mineral salts is performed by
A. medullary rays
B. vascular cambium
D. secondary phloem
Exp.The vascular cambium is the main growth tissue in the stems and roots of many plants, gymnosperms such as pine trees, as well as in certain vascular plants. It produces secondary xylem inwards, towards the pith, and secondary phloem outwards, towards the bark.
Q92. Grafting cannot be practised in mono-cotyledonous plants because they
A. have very thin tissue
B. vascular combiums
C. have many vascular bundles
D. have endarch xylem
Q93. Mycology is the study of
Exp.Mycology is the branch of biology concerned with the study of fungi, including their genetic and biochemical properties, their taxonomy and their use to humans as a source for tinder, traditional medicine, food, and entheogens, as well as their dangers, such as toxicity or infection.
Q94. The group of plants containing algal and fungal partners association is called
Exp.Lichens are bizarre organisms and no two are alike. Lichens are a complex life form that is a symbiotic partnership of two separate organisms, a fungus and an alga. The dominant partner is the fungus, which gives the lichen the majority of its characteristics, from its thallus shape to its fruiting bodies.
Q95. The largest cell found in plant kingdom is that of
Exp.Acetabularia is a genus of green algae in the family Polyphysaceae, Typically found in subtropical waters, Acetabularia is a single-celled organism, but gigantic in size and complex in form, making it an excellent model organism for studying cell biology.
Q96. Electron microscope was invented by
A. Robert Hooke
B. Watson and Crick
C. Jacob and Monad
Exp.The first prototype electron microscope, capable of four-hundred-power magnification, was developed in 1931 by the physicist Ernst Ruska and the electrical engineer Max Knoll. The apparatus was the first practical demonstration of the principles of electron microscopy.
Q97. Apple is
A. aggregate fruit
B. false fruit
C. true fruit
D. none of these
Exp.Fruits derived from the ovary and other accessory floral parts are called false fruits. On the contrary, true fruits are those fruits which develop from the ovary, but do not consist of the thalamus or any other floral part. In an apple, the fleshy receptacle forms the main edible part. Hence, it is a false fruit.
Q98. Genes are located on the chromosomes in a
A. linear manner
B. scattered manner
C. circular manner
D. zig – zag manner
Q99. Soil erosion leads to
A. loss of water
B. loss of air
C. loss of vegetation
D. loss of animal life
Exp.Soil erosion is the weathering away of topsoil caused by water, wind or tillage. Pesticides and other chemicals can get trapped in soil, polluting streams and rivers as the soil breaks apart. Soil erosion can also lead to mudslides and floods, negatively affecting the structural integrity of buildings and roadways.
Q100. The plantused by Mendel in his early experiments was
B. Pea plant