1. Which of the following is poor conductor of Heat ?
Air is the poorest conductor of heat among the options due to its low density and thermal conductivity, making it an excellent insulator. Paper is a poor conductor but better than air as it is solid. Iron is a good conductor since metals transfer heat effectively.
2. Sheep breed Bakarwal is known for woollen shawls, found in ?
The Bakarwal sheep breed, known for its high-quality wool used in making woolen shawls, is primarily found in Jammu and Kashmir. This breed thrives in the cold Himalayan region, where its wool is highly valued for its warmth and texture.
3. Scouring is known as ?
Scouring refers to the process of cleaning the fleece of sheep to remove dirt, grease, and other impurities. It is an essential step in wool processing before the fleece can be used for making textiles.
4. Which country leads in silk production ?
China is the leading producer of silk in the world, contributing the majority of global silk production. India follows as the second-largest producer, but China's dominance in silk production is unmatched.
5. Silkworms are caterpillars of ?
Silkworms are the caterpillars of silk moths. They spin cocoons of silk fibers, which are harvested and processed to produce silk.
6. __________ is used to measure temperature of body ?
A clinical thermometer is specifically designed to measure the temperature of the human body accurately.
7. Transfer of heat of an object from hotter end to colder end is known as
Conduction is the transfer of heat within an object or between objects in direct contact, from the hotter end to the colder end.
8. Cool air moving towards sea is
A land breeze occurs when cool air from the land moves toward the sea, typically at night, as the land cools faster than the sea.
9. Temperature is measure of degree of ?
Temperature measures the degree of hotness or coldness of an object. It indicates the amount of thermal energy present in the object.
10. Good conductor of heat and electricity ?
Silver is a good conductor of both heat and electricity, outperforming many other materials in both areas. Diamond, on the other hand, is an excellent conductor of heat but a poor conductor of electricity.
11. On heating of metal, which area of expansion is more ?
When a metal is heated, its volume expands more than its area or diameter. This is because thermal expansion affects all dimensions of the object, and volume expansion occurs in three directions (length, breadth, and height), making it greater compared to the linear or area expansion.
12. Mercury is also known as ?
Mercury is commonly known as "Quick Silver" due to its silvery appearance and its liquid state at room temperature, which gives it a "quick" or flowing nature.
13. Which of the following is used to measure temperature of bed of the sea ?
Thermocouples are commonly used to measure temperature in various environments, including the bed of the sea, due to their ability to withstand extreme conditions and provide accurate readings in high-pressure and underwater environments.
14. Anomalous expansion of water is at ?
Water exhibits anomalous expansion, meaning it expands when cooled from 4°C to 0°C. The maximum density of water occurs at 4°C, and it begins to expand as it freezes. This unique property plays an important role in aquatic life survival during cold weather.
15. Temperature of Ice in Kelvin ?
The freezing point of water, or the temperature of ice, is 0°C, which is equivalent to 273 Kelvin.
16. In thermometer, units are ?
Thermometers can measure temperature in different units, such as:
Degree Celsius (°C)
Fahrenheit (°F)
Kelvin (K)
The unit used depends on the type of thermometer and the measurement system being followed.
17. Best Insulator of heat and electricity ?
Both diamond and silver are excellent conductors of heat and electricity.
The best insulators of heat and electricity are materials like rubber, wood, glass, and plastic, which do not allow heat or electricity to pass through easily.
18. Units is of heat ?
Heat units include erg, joule, and calorie. Erg is used in the CGS system, joule is the SI unit, and calorie measures heat, commonly for food energy in biology and chemistry.
19. Study of heat energy is known as?
Calorimetry is the study of heat energy and its measurement, focusing on heat changes in physical and chemical processes, typically using an instrument called a calorimeter for accurate determination.
20. Wool is ____________ of heat ?
Wool is a poor conductor of heat. It traps air between its fibers, which helps in insulating and retaining body heat, making it an excellent material for keeping warm.
21. Angora wool is found in the region ?
Angora wool, primarily sourced from Angora goats and rabbits, is not commonly found in Jammu and Kashmir. The region is more known for producing Pashmina wool, highly prized for its fine quality.
22. Llama and Alpaca camels found in ?
Llama and Alpaca camels are native to South America, specifically found in countries like Peru, Bolivia, and Chile.
23. Sheep breed Lohi is known for quality of wool found in ?
The Lohi sheep breed, known for its quality wool, is found in both Rajasthan and Punjab.
24. Sheep breed Rampur Bushair is known for brown fleece(hair), found in ?
The Rampur Bushair sheep breed, known for its brown fleece (hair), is found in Uttar Pradesh and Himachal Pradesh.
25. Sheep breed Nali is known for carpet wool, found in ?
The Nali sheep breed, known for its carpet wool, is found in Rajasthan, Haryana, and Punjab.
26. Sheep breed Marwari is known for coarse wool, found in ?
The Marwari sheep, found in Gujarat and Rajasthan, is known for its coarse wool used in carpets and textiles. Originating from the Marwar region, it thrives in dry, hot climates.
27. Sheep breed Patanwadi is known for hosiery, found in ?
The Patanwadi sheep breed, known for its fine wool used in hosiery, is found in Gujarat, primarily in the districts of Kutch, Jamnagar, and Surendranagar.
28. Shearing is known as
Shearing is the process of removing wool from sheep, typically done once a year to harvest wool and maintain the health and hygiene of the sheep.
29. Wool industry workers are vulnerable to bacterium, anthrax known as
Wool industry workers are vulnerable to anthrax caused by the bacterium Bacillus anthracis, commonly referred to as wool-sorter's disease when contracted through inhalation of spores during wool processing.
30. Rearing of silkworms called as
The rearing of silkworms is called sericulture.
31. Silkworms larve stage is known as caterpillar, and next life stage is called as
The silkworm's larval stage is called a caterpillar, followed by the pupa stage, during which it spins a silk cocoon and undergoes metamorphosis into a moth.
32. Silkworms covers itself by silk fibres and turns into pupa, this covering is known as
Silkworms cover themselves with silk fibers and turn into a pupa; this protective covering is known as a cocoon.
33. In solids, heat transfers through ?
In solids, heat transfers through conduction, where thermal energy moves from particle to particle due to collisions and vibrations within the material.
34. Which of the following are good conductors of heat ?
Good conductors of heat include:
Metals such as copper, aluminum, iron, and gold.
These materials have free electrons that help transfer heat efficiently.
35. Poor conductors of heat are?
Poor conductors of heat, also known as insulators, include:
Wood
Plastic
Rubber
Glass
Air
These materials do not allow heat to pass through them easily.
36. In liquids and gases, mode of transfer of heat is
In liquids and gases, the mode of heat transfer is convection.
This process involves the movement of heated particles, which rise due to lower density, while cooler particles sink, creating a circulation that transfers heat.
37. Air from sea id called as
Air from the sea is called sea breeze. It occurs when cool air from the sea moves toward the land to replace the rising warm air, typically during the day.
38. Transfer of heat from the sun is called as
The transfer of heat from the sun is called radiation. It occurs through electromagnetic waves, particularly infrared radiation, without requiring a medium such as air or water.
39. Transfer of heat through radiation ?
The transfer of heat through radiation occurs when energy is emitted as electromagnetic waves, such as infrared radiation. Unlike conduction and convection, radiation does not require a medium and can occur in a vacuum. An example is the warmth felt from the sun's rays, which travel through space and reach the Earth.
40. Weather report reported temperature is measured by ?
The temperature reported in weather reports is measured by a thermometer. Common types include mercury, alcohol, and digital thermometers, depending on the method used for measurement.
41. Normal temperature of human body
The normal temperature of the human body is typically around 37°C (98.6°F). However, it can vary slightly depending on factors such as time of day, activity level, and individual differences.
42. Range of Clinical thermometer ?
The range of a clinical thermometer is typically from 35°C to 42°C (95°F to 108°F). This range is suitable for measuring human body temperature.
43. Clinical thermometer contains ?
A clinical thermometer contains mercury or alcohol (in some modern thermometers). Mercury expands with temperature changes, allowing the thermometer to accurately measure body temperature. Alcohol is used in some thermometers because it's less toxic.
44. Temperature is measured by
Temperature is measured by a thermometer. Common types include:
Mercury thermometer (traditional)
Digital thermometer (electronic)
Infrared thermometer (non-contact)
Alcohol thermometer (in some cases)
45. Silk fibres are made up of ?
Silk fibers are made up of a protein called fibroin. This protein is produced by silkworms in their salivary glands and is responsible for the formation of the silk thread.
46. Which of the following are yield of wool ?
The yield of wool refers to the amount of wool that can be harvested from an animal. Common sources of wool include:
Sheep (primary source of wool)
Goats (producing cashmere or mohair)
Rabbits (producing angora wool)
Alpacas (producing alpaca wool)
Llamas (producing llama wool)
These animals produce fibers that are processed to create wool-based textiles.
47. Process of taking out threads from cocoon for silk is called as
The process of taking out threads from the cocoon to produce silk is called reeling. During reeling, the silk fibers are unwound from the cocoon and then spun into threads.
48. Slikworms feed on which of the following leaves
Silkworms primarily feed on the leaves of the mulberry tree (Morus species). These leaves are rich in nutrients necessary for the growth and development of silkworms.
49. Plants can prepare their food by
Plants prepare their food through photosynthesis, using sunlight, carbon dioxide, and water to produce glucose and oxygen. This process occurs in the chloroplasts of plant cells, primarily in the leaves.
50. Which part of the plant is known as food factories of plant
The leaves of a plant are known as its food factories. This is because they perform photosynthesis, the process by which plants convert sunlight into energy and produce food in the form of glucose.
51. Single Cell is enclosed by thin outer boundary called ?
A single cell is enclosed by a thin outer boundary called the cell membrane (or plasma membrane). It regulates the movement of substances in and out of the cell.
52. Plants can not absorb which of the following gaseous form
Plants cannot absorb nitrogen in its gaseous form (N₂). They absorb nitrogen as nitrates or ammonia through their roots, which is converted by nitrogen-fixing bacteria or industrial processes.
53. Examples of Parasites plants
Examples of parasitic plants include:
Mistletoe – Attaches to trees and absorbs water and nutrients.
Dodder – Twines around host plants and feeds off them.
Broomrape – Parasitizes the roots of other plants.
Indian pipe – A non-photosynthetic plant that derives nutrients from fungi associated with tree
54. Which Bacterium converts Nitrogen into soluble form
Rhizobium bacteria convert atmospheric nitrogen (N₂) into a soluble form like ammonium (NH₄⁺) through nitrogen fixation. This process occurs in the root nodules of leguminous plants, benefiting plant growth.
55. Breakdown of complex components of food into simple substance is called as ?
The breakdown of complex components of food into simple substances is called digestion. This process occurs in the digestive system, where enzymes break down proteins, fats, and carbohydrates into simpler molecules.
56. Arrangement of human teeth
Human teeth are arranged as follows: 8 incisors, 4 canines, 8 premolars, and 12 molars (including 4 wisdom teeth), totaling 32 teeth used for cutting, tearing, grinding, and chewing food.
57. Small Intestine is about length of
The small intestine is about 6 to 7 meters (20 to 23 feet) in length in adults. It is responsible for most of the digestion and absorption of nutrients from food.
58. In digestion process
In digestion, food is broken down in the mouth, stomach, and small intestine. Enzymes and bile help break down nutrients, which are absorbed in the small intestine, and waste is excreted.
59. assimilation means ?
Assimilation refers to the process by which the absorbed nutrients from digested food are transported to the cells of the body and utilized for growth, energy, and repair.
60. Velli helps in
Velli is a term used in agriculture, especially in the context of rice cultivation, referring to the fields or paddy fields. It helps in growing rice by providing a controlled environment for water management, essential for the rice-growing process.
61. Nutrition is process which consists of
Nutrition is the process of obtaining and using food. It includes ingestion, digestion, absorption, assimilation (utilization of nutrients by cells), and egestion (elimination of undigested waste from the body).
62. Digestion of Proteins begins in
The digestion of proteins begins in the stomach. The enzyme pepsin, along with gastric juices, starts breaking down proteins into smaller peptides. Further digestion occurs in the small intestine.
63. Digestion of carbohydrates like starch begins in ?
The digestion of carbohydrates, like starch, begins in the mouth. The enzyme salivary amylase starts breaking down starch into simpler sugars. The process continues in the small intestine.
64. Grazing animals are called as
Grazing animals are called herbivores. They feed primarily on plants, such as grasses, leaves, and shrubs. Examples include cows, goats, sheep, and deer.
65. Ameoba ingests/takes food through
Amoeba ingests food through a process called phagocytosis. It uses its flexible cell membrane to engulf food particles, forming a food vacuole. The food is then digested inside the vacuole by enzymes.
66. Amoeba is ?
Amoeba is a single-celled, microscopic organism from the Protista kingdom. It moves using amoeboid movement, engulfs food via phagocytosis, and reproduces asexually through binary fission in diverse environments.
67. Grass is rich in ?
Grass is rich in cellulose, a complex carbohydrate that provides structural support to plants. It also contains fiber, which is beneficial for digestion, and small amounts of proteins and minerals.
68. Cows and Buffaloes stores food in ?
Cows and buffaloes store food in the rumen, the first compartment of their stomach. The rumen ferments and breaks down plant material, aiding in the digestion of cellulose-rich food.
69. Large Intestine helps in ?
The large intestine helps in the absorption of water, minerals, and vitamins produced by gut bacteria. It also forms and stores feces before they are excreted from the body.
70. Large intestine is about ?
The large intestine is about 1.5 meters (5 feet) in length. It is responsible for absorbing water and electrolytes, forming and storing feces, and housing beneficial bacteria that aid digestion.
71. Small Intestine contains finger like outgrowths called
The small intestine contains finger-like outgrowths called villi. These structures increase the surface area for the absorption of nutrients from digested food into the bloodstream. Each villus is covered with microvilli for further absorption.
72. Which of the following plays a major role in digestions of fats ?
The liver produces bile, which is stored in the gallbladder and released into the small intestine. Bile emulsifies fats, aiding digestion, while the enzyme lipase breaks them down further.
73. Liver secrets __________ juices ?
The liver secretes bile juice. Bile aids in the digestion and emulsification of fats in the small intestine, making them easier to break down by enzymes like lipase.
74. Largest gland of the body ?
The liver is the largest gland in the body. It plays a crucial role in various functions, including detoxification, protein synthesis, and the production of bile for digestion.
75. Inner lining of stomach secretes
The inner lining of the stomach secretes gastric juices, including hydrochloric acid (HCl), which aids in food breakdown and bacteria elimination, and pepsinogen, which is converted into pepsin for protein digestion.
76. food pipe in humans called as
The food pipe in humans is called the esophagus. It is a muscular tube that connects the throat (pharynx) to the stomach, allowing the passage of food through peristalsis (muscle contractions).
77. Process of taking food into the body is known as
The process of taking food into the body is known as ingestion. It involves the intake of food through the mouth, after which it travels down the esophagus to the stomach.
78. Alimentary canal consist of ?
The alimentary canal consists of the mouth, esophagus, stomach, small intestine, large intestine, rectum, and anus, which are responsible for digestion, absorption, and waste elimination in the body.
79. Leguemious plants examples ?
Examples of leguminous plants include peas, beans, lentils, chickpeas, soybeans, groundnuts (peanuts), alfalfa, and clover. They belong to the Leguminosae family and help fix nitrogen in soil.
80. Examples of Sarprotrophs Plants ?
Examples of saprotrophic plants include Indian Pipe, Ghost Plant, Bird's-nest Orchid, Coralroot Orchids, and Snow Plant. These plants rely on fungi to obtain nutrients from decaying organic matter.
81. Which are major sources for living organism to build their body
Living organisms build their bodies using carbon, hydrogen, oxygen, nitrogen, phosphorus, minerals, and water. These are obtained from air, water, soil, or food to form essential biomolecules and structures.
82. Autotrophic means
Autotrophic refers to organisms that produce their own food using inorganic substances. They obtain energy through photosynthesis (using sunlight, e.g., plants) or chemosynthesis (using chemicals, e.g., some bacteria).
83. Plants are
Plants are autotrophic organisms that produce their own food through photosynthesis. They use sunlight, water, and carbon dioxide to create energy, releasing oxygen. They form the base of ecosystems.
84. Animals are
Animals are heterotrophic organisms that depend on other organisms for food. They cannot produce their own energy and rely on plants or other animals for nutrition. Most are mobile and multicellular.
85. Tiny Pores present in leaves are surrounded by guard cell are called as
Tiny pores present in leaves, surrounded by guard cells, are called stomata. They regulate gas exchange and water vapor loss, playing a crucial role in photosynthesis and transpiration.
86. Living organisms are made of units of
Living organisms are made of units called cells, which are the basic structural and functional units of life. Cells can be prokaryotic (e.g., bacteria) or eukaryotic (e.g., plants, animals).
87. Nucleus is surrounded by jelly like substance called
The nucleus is surrounded by a jelly-like substance called cytoplasm. It contains organelles and provides a medium for cellular processes. However, directly surrounding the nucleus is the nucleoplasm, enclosed by the nuclear membrane.
88. Leaves are in green color because of having green pigment called
Leaves are green because they contain a green pigment called chlorophyll. Chlorophyll absorbs light for photosynthesis, primarily absorbing red and blue light, while reflecting green light.
89. During Photo synthesis process, which gas is released ?
During the process of photosynthesis, oxygen (O₂) is released as a byproduct. This occurs when plants use sunlight, water, and carbon dioxide to produce glucose and oxygen.
90. Algea is in green color because ?
Algae are green because they contain the green pigment chlorophyll, which helps them absorb light for photosynthesis. Chlorophyll primarily absorbs blue and red light, reflecting green light.
91. Carbohydrates are made by ?
Carbohydrates are made by plants during photosynthesis. They use carbon dioxide from the air, water from the soil, and energy from sunlight to produce glucose, a type of carbohydrate.
92. Plants eats Insects, which are called as
Plants that eat insects are called carnivorous plants. Examples include the Venus flytrap, pitcher plants, and sundews. They capture and digest insects to obtain nutrients, especially nitrogen.
93. Hetrotrophic plants are mainly divided into 4 types, which are ?
Heterotrophic plants are mainly divided into four types:
Saprophytic Plants - Obtain nutrients from decaying organic matter (e.g., Indian Pipe).
Parasitic Plants - Obtain nutrients by parasitizing other plants (e.g., Mistletoe, Dodder).
Carnivorous Plants - Capture and digest insects or small animals for nutrients (e.g., Venus Flytrap, Pitcher plant).
Mycoheterotrophic Plants - Depend on fungi for nutrients, forming a symbiotic relationship (e.g., Ghost plant).
94. Saprotrophs, which grow and live on dead and decaying organic matter of animals and plant, examples are ?
Saprotrophs that live on decaying organic matter include fungi (e.g., mushrooms, mold), bacteria, vultures, and earthworms. They decompose dead plants and animals, recycling nutrients in ecosystems.