NSCL Trainee Agriculture Paper 2021 With Answers
1. The diameter of a clay particle is:
(1) Less than 0.002 mm
(2) More than 0.002 mm
(3) More than 0.02 mm
(4) None of these
Answer: (1) Less than 0.002 mm
2. The grain crop most sensitive to soil acidity is:
(1) Wheat
(2) Barley
(3) Oats
(4) Paddy
Answer: (2) Barley
3. Which is the most drought-resistant crop:
(1) Sorghum
(2) Wheat
(3) Pearl millet
(4) Peas
Answer: (3) Pearl millet
4. What is used for the reclamation of usar soil:
(1) Superphosphate
(2) Bone meal
(3) Gypsum
(4) Lime
Answer: (3) Gypsum
5. Islets of Langerhans are found in:
(1) Australia
(2) Pancreas
(3) Ovary
(4) Liver
Answer: (2) Pancreas
6. Antidiuretic hormone (ADH) is:
(1) Gastrin
(2) Pancreozymin
(3) Testosterone
(4) Vasopressin
Answer: (4) Vasopressin
7. Who propounded the recapitulation theory:
(1) Lamarck
(2) Haeckel
(3) Miller
(4) Darwin
Answer: (2) Haeckel
8. The most effective fertilizer for acid soil is:
(1) Rock phosphate
(2) DAP
(3) SSP
(4) None of these
Answer: (1) Rock phosphate
9. In what form is Zinc absorbed by plants:
(1) Zn+
(2) Zn++
(3) Zn+++
(4) None of these
Answer: (2) Zn++
10. The body cavity of Hydra is called:
(1) Hydrocoel
(2) Haemocoel
(3) Coelom
(4) Coelenteron
Answer: (4) Coelenteron
11. Anal cerci are found:
(1) Only in male Ascaris
(2) Only in male cockroach
(3) Only in female cockroach
(4) Both in male and female cockroach
Answer: (2) Only in male cockroach
12. Ommatidia are found in the eyes of:
(1) Amphibians
(2) Insects
(3) Birds
(4) Mammals
Answer: (2) Insects
13. Which insect produces wax:
(1) Honey bee
(2) Termite
(3) Lac insect
(4) Locust
Answer: (1) Honey bee
14. Vitamin necessary for blood clotting is:
(1) A
(2) B
(3) C
(4) K
Answer: (4) K
15. The placentation of Compositae is:
(1) Marginal
(2) Parietal
(3) Axile
(4) Basal
Answer: (2) Parietal
16. A distinct monocot character shown by the flowers of Liliaceae is:
(1) Hypogynous flower
(2) Actinomorphic flower
(3) Trimerous flower
(4) Bisexual flower
Answer: (3) Trimerous flower
17. The coleoptile in grass seedling is:
(1) Radicle
(2) Plumule
(3) Cotyledon
(4) Sheath around emerging leaf
Answer: (4) Sheath around emerging leaf
18. Flagellated larva of Leucosolenia is called:
(1) Planula
(2) Parenchymula
(3) Hydrula
(4) Amphiblastula
Answer: (2) Parenchymula
19. Which one is not a variety of potato:
(1) Kufri Naveen
(2) Kufri Alankar
(3) Kufri Kundan
(4) Kufri Kumar
Answer: (4) Kufri Kumar
20. Tapping and desuckering is done in:
(1) Cotton
(2) Tobacco
(3) Potato
(4) Gram
Answer: (2) Tobacco
21. Ginning percent in cotton means:
(1) Percentage of cotton fuzz
(2) Percentage of cotton seed
(3) Percentage of cotton fibre
(4) Percentage of thread in cotton fibre
Answer: (3) Percentage of cotton fibre
22. Contour farming means:
(1) Growing crops on levelled strips
(2) Growing crops on land of same elevation
(3) Growing crops across the slope
(4) Growing crops parallel to the slope
Answer: (3) Growing crops across the slope
23. The process of fastening a plough to the yoke is called:
(1) Centering
(2) Joining
(3) Hitching
(4) Connecting
Answer: (3) Hitching
24. Deficiency of which element causes ‘Whip Tail’ disease in cauliflower:
(1) Boron
(2) Iron
(3) Molybdenum
(4) Zinc
Answer: (3) Molybdenum
25. Water requirement of dwarf wheat is:
(1) 10-15 cm/ha
(2) 25-30 cm/ha
(3) 60-70 cm/ha
(4) 70-80 cm/ha
Answer: (3) 60-70 cm/ha
26. Agronomy means:
(1) Crop management
(2) Crop husbandry
(3) Soil & Crop management
(4) Soil management
Answer: (3) Soil & Crop management
27. Maize belongs to the family:
(1) Poaceae
(2) Brassicaceae
(3) Asteraceae
(4) Fabaceae
Answer: (1) Poaceae
28. Which crop has maximum production in India:
(1) Rice
(2) Wheat
(3) Jowar
(4) Maize
Answer: (1) Rice
29. Which is mismatched:
(1) Lepidoptera – Butterfly
(2) Hemiptera – Termite
(3) Coleoptera – Beetle
(4) Apterygota – Lepisma
Answer: (2) Hemiptera – Termite
Explanation: Termites belong to the order Isoptera, not Hemiptera.
30. In insects, the stomach is a part of:
(1) Foregut
(2) Midgut
(3) Hindgut
(4) Proventriculus
Answer: (2) Midgut
Explanation: The midgut is responsible for digestion and absorption in insects.
31. The sowing time of pearl millet is:
(1) June
(2) July
(3) August
(4) September
Answer: (1) June
Explanation: Pearl millet is typically sown with the onset of monsoon in June.
32. The sowing time of berseem is:
(1) August
(2) October
(3) December
(4) February
Answer: (2) October
Explanation: Berseem is usually sown in October for optimal growth.
33. Nipping in gram is done to:
(1) Retard vegetative growth
(2) Induce branching
(3) Encourage early flowering
(4) All of the above
Answer: (4) All of the above
Explanation: Nipping helps in controlling vegetative growth, inducing branching, and promoting early flowering in gram plants.
34. Sprouting of potato under storage conditions is due to:
(1) Auxin
(2) Gibberellin
(3) Ethylene
(4) Cytokinin
Answer: (2) Gibberellin
Explanation: Gibberellins promote sprouting in stored potatoes.
35. A gene is mainly or entirely made up of:
(1) Protein
(2) DNA
(3) Carbohydrate
(4) Amino acids
Answer: (2) DNA
Explanation: Genes are segments of DNA that code for proteins.
36. Some flowers open during the day and close at night. This is known as:
(1) Photolaxy
(2) Photonasty
(3) Phototropism
(4) Photoperiodism
Answer: (2) Photonasty
Explanation: Photonasty refers to non-directional movement of plant parts in response to light, such as flowers opening during the day and closing at night.
37. Study of fishes and fish culture is known as:
(1) Herpetology
(2) Helminthology
(3) Ophiology
(4) Ichthyology
Answer: (4) Ichthyology
Explanation: Ichthyology is the branch of zoology that deals with the study of fishes.
38. Woodpecker bird belongs to the order:
(1) Strigiformes
(2) Piciformes
(3) Coraciiformes
(4) Falconiformes
Answer: (2) Piciformes
Explanation: Woodpeckers are part of the order Piciformes.
39. Tuber of Solanum tuberosum is:
(1) Tap root
(2) Modified stem
(3) Lateral root
(4) Root cap
Answer: (2) Modified stem
Explanation: The tuber of Solanum tuberosum (potato) is a modified stem that stores nutrients.
40. Inflorescence of mustard plant is:
(1) Solitary
(2) Racemose
(3) Panicle of spikelets
(4) Cymose
Answer: (2) Racemose
Explanation: Mustard plants exhibit racemose inflorescence, where flowers are arranged along the main axis.
41. Cross pollination is done by:
(1) Pollen of the same flower
(2) Pollen of another flower on the same plant
(3) Pollen of a flower on a different plant of the same species
(4) Without pollen
Answer: (3) Pollen of a flower on a different plant of the same species
Explanation: Cross-pollination involves the transfer of pollen from a flower on one plant to a flower on a different plant of the same species.
42. Radial vascular bundle is found in:
(1) Monocot stem
(2) Dicot stem
(3) Roots
(4) Leaf
Answer: (3) Roots
Explanation: Radial vascular bundles, where xylem and phloem are arranged alternately on different radii, are characteristic of roots.
43. The spines of fruits of Trapa are modified:
(1) Sepals
(2) Petals
(3) Stamens
(4) Styles
Answer: (1) Sepals
Explanation: In Trapa (water chestnut), the spines on the fruit are modified sepals.
44. Identify the rainy season onion variety from the following:
(1) N-53
(2) NP-46
(3) Pusa Rubi
(4) Pusa Kesar
Answer: (1) N-53
Explanation: The N-53 onion variety is suitable for cultivation during the kharif (rainy) season.
45. Identify the common edible part of sweet potato for human consumption:
(1) Leaf
(2) Stem
(3) Root
(4) None of these
Answer: (3) Root
Explanation: The edible part of the sweet potato is its enlarged storage root.
46. Identify the bulb crop in the following:
(1) Onion
(2) Sweet potato
(3) Ginger
(4) Potato
Answer: (1) Onion
Explanation: Onion is a bulb crop, characterized by its layered fleshy leaves.
47. Identify the cole crop in the following:
(1) Knol-Khol
(2) Onion
(3) Turnip
(4) Carrot
Answer: (1) Knol-Khol
Explanation: Knol-Khol (kohlrabi) is a cole crop, belonging to the Brassica family.
48. What is the family of musk melon:
(1) Cucurbitaceae
(2) Umbelliferae
(3) Liliaceae
(4) Cruciferae
Answer: (1) Cucurbitaceae
Explanation: Musk melon (Cucumis melo) belongs to the Cucurbitaceae family.
49. Using two pairs—tall and dwarf, and smooth and wrinkled seeds—the principle of independent assortment of characters is proved by the:
(1) Observation that F₁ progeny is tall
(2) Appearance of tall and dwarf in a 3:1 ratio and also the appearance of smooth and wrinkled seeded plants in a 3:1 ratio in F₂
(3) Appearance of tall and dwarf in F₂ population
(4) Appearance of smooth and wrinkled seeded plants in F₂ population
Answer: (2) Appearance of tall and dwarf in a 3:1 ratio and also the appearance of smooth and wrinkled seeded plants in a 3:1 ratio in F₂
Explanation: Mendel’s dihybrid cross demonstrated that genes for different traits assort independently, resulting in a 9:3:3:1 phenotypic ratio in the F₂ generation.
50. Competition for food, light, and space is most severe between plants:
(1) Closely related species growing in the same habitat
(2) Closely related species growing in different habitats
(3) Distantly related species occupying the same habitat
(4) Distantly related species occupying different habitats
Answer: (1) Closely related species growing in the same habitat
Explanation: Closely related species have similar ecological niches and resource requirements, leading to intense competition when they occupy the same habitat.
51. Lysosomes are the storehouse of:
(1) ATP
(2) Hydrolytic enzymes
(3) Fats
(4) Glycoproteins
Answer: (2) Hydrolytic enzymes
Explanation: Lysosomes contain hydrolytic enzymes that break down waste materials and cellular debris.
52. The genetic systems in prokaryotes and eukaryotes:
(1) Are similar and enclosed in nuclei
(2) Are not similar but enclosed in nuclei in both
(3) Differ in one respect that the prokaryotes lack histones which are always found in eukaryotes
(4) Differ in several respects
Answer: (4) Differ in several respects
Explanation: Prokaryotic genetic material is not enclosed within a nucleus and lacks histones, whereas eukaryotic genetic material is enclosed within a nucleus and associated with histones.
53. The presence of DNA in mitochondria and in chloroplasts supports the hypothesis that:
(1) Glycolysis occurs in both mitochondria and chloroplasts
(2) Mitochondria and chloroplasts both originated as independent free-living organisms
(3) ATP is produced in both
(4) Mitochondria and chloroplasts undergo meiosis and mitosis, independently
Answer: (2) Mitochondria and chloroplasts both originated as independent free-living organisms
Explanation: The presence of their own DNA in mitochondria and chloroplasts supports the endosymbiotic theory, which suggests these organelles originated from free-living prokaryotes.
54. The strongest evidence that DNA is the genetic material comes from:
(1) The fact that chromosomes are made of DNA
(2) Studies on the transformation of bacterial cells
(3) The knowledge that DNA is present in the nucleus
(4) That DNA has the power to duplicate itself
Answer: (2) Studies on the transformation of bacterial cells
Explanation: Experiments like Griffith’s transformation experiment provided strong evidence that DNA is the genetic material.
55. Meiosis involves:
(1) One division of the nucleus and one division of chromosomes
(2) One division of the nucleus and two divisions of chromosomes
(3) Two divisions of the nucleus and two divisions of chromosomes
(4) Two divisions of the nucleus and one division of chromosomes
Answer: (3) Two divisions of the nucleus and two divisions of chromosomes
Explanation: Meiosis consists of two sequential nuclear divisions (meiosis I and II) and chromosome divisions, resulting in four non-identical haploid cells.
56. The resin duct of a gymnospermous stem is an example of:
(1) Intercellular space
(2) Schizogenous cavity
(3) Lysogenous cavity
(4) Big vacuole
Answer: (2) Schizogenous cavity
Explanation: Resin ducts in gymnosperms are formed by the splitting of cells, a process known as schizogenesis. These ducts are spaces that contain resin.
57. A pome fruit is said to be false because:
(1) Its pericarp is inconspicuous
(2) Its endocarp is cartilaginous
(3) Its actual fruit is located within an edible fleshy thalamus
(4) It develops from an inferior ovary
Answer: (3) Its actual fruit is located within an edible fleshy thalamus
Explanation: Pome fruits, such as apples and pears, develop from an inferior ovary, but the fleshy part of the fruit is derived from the thalamus, making it a “false” fruit.
58. The three subfamilies of leguminosae are distinguished mainly on the basis of:
(1) Nature of gynoecium
(2) Nature of corolla and stamens
(3) Nature of habit of the plants
(4) Nature of fruits
Answer: (2) Nature of corolla and stamens
Explanation: The three subfamilies of Leguminosae—Papilionoideae, Caesalpinioideae, and Mimosoideae—are distinguished based on the structure of their flowers, specifically the nature of the corolla and stamens.
59. If the osmotic potential of a cell is “–10 bars” and its pressure potential is +5 bars, its water potential would be:
(1) –5 bars
(2) +5 bars
(3) –10 bars
(4) +15 bars
Answer: (1) –5 bars
Explanation: Water potential is the sum of osmotic potential and pressure potential. Water potential = Osmotic potential + Pressure potential. Here, water potential = –10 + 5 = –5 bars.
60. Post-anal tail is not found in:
(1) Amphioxus
(2) Frog
(3) Birds
(4) Cockroach
Answer: (4) Cockroach
Explanation: Post-anal tail is a characteristic feature of chordates like amphibians (e.g., frogs) and mammals, but it is not found in arthropods like cockroaches.
61. Which of these hormones stimulates lactation at the time of breastfeeding?
(1) Oxytocin
(2) Relaxin
(3) Prolactin
(4) Progesterone
Answer: (3) Prolactin
Explanation: Prolactin is the hormone responsible for stimulating milk production (lactation) in the mammary glands during breastfeeding. Oxytocin aids in milk ejection, but prolactin controls milk synthesis.
62. Mulching is a process that helps in:
(1) Moisture conservation
(2) Weed control
(3) Soil fertility
(4) Improvement of soil structure
Answer: (1) Moisture conservation
Explanation: Mulching involves covering the soil with organic or inorganic material to retain moisture, control weeds, and improve soil fertility and structure. However, its primary function is moisture conservation.
63. Heterophyllous plants are found as:
(1) Free-floating hydrophytes
(2) Submerged hydrophytes
(3) Rooted and floating hydrophytes
(4) Halophytes
Answer: (3) Rooted and floating hydrophytes
Explanation: Heterophyllous plants exhibit different types of leaves at different stages of growth or under different environmental conditions. Rooted and floating hydrophytes, like certain species of water plants, show this characteristic.
64. The diatoms do not easily decay like most of the other algae because:
(1) They have highly siliceous walls
(2) They are non-living
(3) They have waterproof cells
(4) Their walls are mucilaginous
Answer: (1) They have highly siliceous walls
Explanation: Diatoms have cell walls made of silica (SiO₂), which makes them resistant to decay compared to other algae that have softer, organic walls. Their siliceous walls contribute to their fossilization.
65. Which of these arteries carries impure blood?
(1) Carotid
(2) Brachial
(3) Pulmonary
(4) Gonadial
Answer: (3) Pulmonary
Explanation: The pulmonary artery carries deoxygenated (impure) blood from the heart to the lungs for oxygenation, unlike other arteries that carry oxygenated blood.
66. Which of these has the thickest wall?
(1) Left auricle
(2) Left ventricle
(3) Right auricle
(4) Right ventricle
Answer: (2) Left ventricle
Explanation: The left ventricle has the thickest muscular wall as it needs to pump oxygenated blood throughout the entire body, which requires more force.
67. Intercalated discs are found in:
(1) Cardiac muscles
(2) Skeletal muscles
(3) Smooth muscles
(4) All muscles
Answer: (1) Cardiac muscles
Explanation: Intercalated discs are specialized connections between cardiac muscle cells that allow for synchronized contraction of the heart muscle.
68. Which is not found in birds?
(1) Syrinx
(2) Preen glands
(3) Urinary bladder
(4) Heterocoelous vertebrae
Answer: (3) Urinary bladder
Explanation: Birds do not have a urinary bladder. Instead, they excrete uric acid as a paste to conserve water.
69. Which nephridia of earthworm is exonephric?
(1) Pharyngeal
(2) Integumentary
(3) Septal
(4) None of the above
Answer: (2) Integumentary
Explanation: Integumentary nephridia in earthworms are exonephric, meaning they open to the outside through the skin.
NSCL Mock Test Series
70. In plants, a common symptom caused by deficiency of P, K, Ca, and Mg is:
(1) Bending of leaf tip
(2) Formation of anthocyanin
(3) Poor development of vasculature
(4) Appearance of dead necrotic areas
Answer: (4) Appearance of dead necrotic areas
Explanation: A deficiency of key nutrients like phosphorus (P), potassium (K), calcium (Ca), and magnesium (Mg) often causes necrotic areas on plant tissues.
71. Hill reaction is concerned with the production of:
(1) Reducing agent like TPNH2 or NADPH2 and oxygen from H2O from chloroplast
(2) Oxygen due to photolysis in chloroplast
(3) Reducing agent and A.T.P. in chloroplast
(4) Reducing agent and A.T.P. in mitochondria
Answer: (1) Reducing agent like TPNH2 or NADPH2 and oxygen from H2O from chloroplast
Explanation: The Hill reaction involves the splitting of water molecules in the chloroplasts, releasing oxygen and generating reducing agents like NADPH.
72. Edible part of cauliflower is:
(1) Leaf
(2) Head
(3) Curd
(4) Inflorescence
Answer: (4) Inflorescence
Explanation: The edible part of cauliflower is the undeveloped flower clusters, also known as the inflorescence.
73. An apparatus commonly used to demonstrate phototropism is:
(1) Heliotropic chamber
(2) Clinostat
(3) Arc auxanometer
(4) Photometer
Answer: (2) Clinostat
Explanation: A clinostat is used to demonstrate phototropism by rotating plants slowly to minimize gravitational effects and allow light to be the primary stimulus.
74. The most important growth stage of wheat for irrigation is:
(1) Crown root initiation
(2) Maximum tillering
(3) Jointing
(4) Boot leaf stage
Answer: (3) Jointing
Explanation: The jointing stage is critical for wheat irrigation because it is when the plant starts forming the structure that will eventually produce the head (grain). Proper irrigation at this stage supports optimal growth and yield.
75. Life originated in:
(1) Precambrian
(2) Coenozoic
(3) Mesozoic
(4) Palaeozoic
Answer: (1) Precambrian
Explanation: Life is believed to have originated in the Precambrian period, which spans from the formation of Earth about 4.6 billion years ago to the emergence of complex life about 541 million years ago.
76. Plants differ from animals in:
(1) Having cell membrane
(2) Being autotrophic
(3) Absence of movements
(4) Absence of growth
Answer: (2) Being autotrophic
Explanation: Plants are autotrophic, meaning they produce their own food through photosynthesis, while animals are heterotrophic, relying on other organisms for nutrition.
77. The cell-to-cell continuity is maintained by:
(1) Middle lamella
(2) Thickening of lignin
(3) Plasmodesmata
(4) Cell membrane
Answer: (3) Plasmodesmata
Explanation: Plasmodesmata are microscopic channels that connect plant cells, allowing communication and continuity between cells.
78. Which of these is the exclusive feature of class Mammalia?
(1) Warm blooded
(2) Four chambered heart
(3) Internal fertilization
(4) Muscular diaphragm
Answer: (4) Muscular diaphragm
Explanation: The muscular diaphragm is unique to mammals and helps in the efficient respiration process, distinguishing them from other vertebrates.
79. Archaeopteryx is the connecting link between:
(1) Amphibia and Reptilia
(2) Reptilia and Aves
(3) Reptilia and Mammalia
(4) Aves and Mammalia
Answer: (2) Reptilia and Aves
Explanation: Archaeopteryx is considered the connecting link between reptiles and birds, showcasing characteristics of both groups, such as feathers (from birds) and reptilian features like teeth.
80. Juvenile hormone or neotenin is secreted by:
(1) Corpora allata
(2) Corpora cardiaca
(3) Prothoracic gland
(4) Neurosecretory cells
Answer: (1) Corpora allata
Explanation: The corpora allata are glands that secrete juvenile hormones in insects, regulating their development and preventing premature metamorphosis.
81. Rhabdome is found in the eyes of:
(1) Mollusc
(2) Frog
(3) Rabbit
(4) Insects
Answer: (4) Insects
Explanation: Rhabdomes are found in the compound eyes of insects, where they help in light detection and the formation of visual signals.
82. Which is the main feature of axis vertebra?
(1) Sigmoid notch
(2) Olecranon fossa
(3) Odontoid process
(4) Vertebraterial canal
Answer: (3) Odontoid process
Explanation: The odontoid process, also known as the dens, is a prominent feature of the axis vertebra (C2), which allows for the rotation of the head.
83. Identify the vegetable which is richest in iron:
(1) Fenugreek leaf
(2) Spinach leaf
(3) Onion leaf
(4) Coriander leaf
Answer: (2) Spinach leaf
Explanation: Spinach is widely recognized as one of the best plant-based sources of iron, which is crucial for the production of hemoglobin in the body.
84. Which one in the following fruit and vegetable is the richest source of Vitamin A:
(1) Carrot
(2) Pumpkin
(3) Pea
(4) Apple
Answer: (1) Carrot
Explanation: Carrots are well known for their high content of beta-carotene, a precursor to vitamin A, which is vital for good vision and immune function.
85. Black heart in Cauliflower is caused by deficiency of:
(1) Boron
(2) Zinc
(3) Copper
(4) Molybdenum
Answer: (1) Boron
Explanation: Black heart in cauliflower is a condition caused by a deficiency of boron, which affects the plant’s ability to take up calcium, leading to symptoms like necrosis.
86. Legume vegetables are known for their richness in:
(1) Protein
(2) Carbohydrates
(3) Fat
(4) Water contents
Answer: (1) Protein
Explanation: Legume vegetables, such as beans, peas, and lentils, are rich in proteins, making them an excellent plant-based source of this macronutrient.
87. Which of the following vegetables needs very low temperature/snowfall for its seed production:
(1) All varieties of cauliflower
(2) All varieties of cabbage
(3) All varieties of carrot
(4) All varieties of spinach
Answer: (1) All varieties of cauliflower
Explanation: Cauliflower requires a cool environment with low temperatures, including exposure to frost, for proper seed production.
88. The following implement is suitable for pulverizing the soil before sowing:
(1) Disk plough
(2) Mouldboard plough
(3) Roller
(4) Disk harrow
Answer: (4) Disk harrow
Explanation: A disk harrow is designed to break up soil clods and prepare the ground by pulverizing the soil before planting.
89. Which of the following is an exotic breed of goat:
(1) Alpine
(2) Pashmina
(3) Black Bengal
(4) Malabari
Answer: (1) Alpine
Explanation: Alpine goats are an exotic breed, known for their high milk production and native to the French Alps.
90. Which of the following is the best source of phosphorus to the animals:
(1) Barley grain
(2) Til cake
(3) Molasses
(4) Wheat bran
Answer: (2) Til cake
Explanation: Til cake, also known as sesame cake, is a rich source of phosphorus, essential for bone health and energy metabolism in animals.
91. Which of the following is the best source of carbohydrate:
(1) Ammonium Sulphate
(2) Urea
(3) Biuret
(4) Molasses
Answer: (4) Molasses
Explanation: Molasses is a byproduct of sugar production and is rich in carbohydrates, providing energy to livestock.
92. Body part which is not found in buffalo:
(1) Brisket
(2) Udder
(3) Dewlap
(4) Naval flap
Answer: (4) Naval flap
Explanation: The naval flap is absent in buffaloes, while other body parts such as the udder, brisket, and dewlap are present in buffaloes.
93. The hypodermis in monocot stem is:
(1) Parenchymatous
(2) Chlorenchymatous
(3) Collenchymatous
(4) Sclerenchymatous
Answer: (1) Parenchymatous
Explanation: In monocot stems, the hypodermis is typically parenchymatous, consisting of soft, thin-walled cells that store water and nutrients.
94. In which of the following trees there is no differentiation of bark, sapwood, and heartwood:
(1) Ashok
(2) Neem
(3) Mango
(4) Datepalm
Answer: (4) Datepalm
Explanation: Datepalm does not show the usual differentiation into bark, sapwood, and heartwood, as it is a monocot plant.
95. An aquatic plant with floating leaf has:
(1) Stomata
(2) Stomata on petiole only
(3) Stomata on upper surface
(4) Stomata on lower surface
Answer: (3) Stomata on upper surface
Explanation: Aquatic plants with floating leaves typically have stomata only on the upper surface of the leaf, as it is exposed to air.
96. Mustard family is:
(1) Graminae
(2) Malvaceae
(3) Cruciferae
(4) Leguminaceae
Answer: (3) Cruciferae
Explanation: Mustard belongs to the Cruciferae family, also known as Brassicaceae, which includes several important vegetables and oilseed crops.
97. Five out of twenty plants obtained by selfing a red flower plant were having white flowers. This is an indication that the plant is:
(1) Homozygous
(2) Heterozygous
(3) Homogenous
(4) Heterogenous
Answer: (2) Heterozygous
Explanation: The appearance of both red and white flowers indicates that the plant is heterozygous, carrying two different alleles for flower color.
98. If a heterozygous tall plant is crossed with a homozygous dwarf plant, the proportion of dwarf progeny would be:
(1) 50%
(2) 25%
(3) 75%
(4) 10%
Answer: (1) 50%
Explanation: A heterozygous tall plant (Tt) crossed with a homozygous dwarf plant (tt) will result in 50% tall (Tt) and 50% dwarf (tt) offspring.
99. Soil particles arranged in order of increasing size are:
(1) Sand-Silt-Clay
(2) Clay-Sand-Silt
(3) Silt-Clay-Sand
(4) Clay-Silt-Sand
Answer: (1) Sand-Silt-Clay
Explanation: The correct order of soil particles from smallest to largest is clay, silt, and sand.
100. The layer of cells between endodermis and vascular bundle is known as:
(1) Pericycle
(2) Cortex
(3) Pith
(4) Epidermis
Answer: (1) Pericycle
Explanation: The pericycle is the layer of cells located between the endodermis and vascular bundle in plant roots, responsible for the formation of lateral roots.