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Science Quiz – Assertion & Reason (Chapter 5-8)

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Welcome to your Science Quiz – Assertion & Reason (Chapter 5-8)

Assertion (A): Autotrophic nutrition occurs in green plants. Reason (R): Green plants manufacture their own food.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Nitrogen is an essential element for plant growth and is taken up by plants in the form of inorganic nitrates and nitrites. Reason (R): The soil is the nearest and richest source of raw materials like nitrogen, phosphorous, and other minerals for the plants.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Amoeba takes in food using finger-like extensions of the cell surface. Reason (R): In all unicellular organisms, the food is taken in by the entire cell surface.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Digestion of carbohydrates start in small intestine. Reason (R): Saliva helps in smooth passage of food in the alimentary canal.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Liver is known as the smallest gland of the body. Reason (R): It secretes bile juice.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): The inner walls of the small intestine have finger-like projections called villi which are rich in blood. Reason (R): These villi have a large surface area to help the small intestine in completing the digestion of food.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Leaves are the major photosynthetic organs of plant. Reason (R): They contain chloroplasts.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Nutrition in Amoeba takes place with the help of pseudopodia. Reason (R): Different stages of Nutrition in Amoeba are ingestion, digestion, absorption and egestion.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Tongue is a part of the mouth that helps in wetting of the food. Reason (R): It helps in producing speech.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Premolars are the two teeth present on each side in each jaw next to canines. Reason (R): The premolars are known as the principal grinders and crushers.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): The rectum is the last part of the Reason (R): The rectum opens into anus which remains closed except when passing bowels.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Respiration is a biochemical process that is opposite to photosynthesis. Reason (R): Energy is released during respiration.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): In anaerobic respiration, one of the end product is water. Reason (R): This is an incomplete breakdown of glucose.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): In the cell, ATP is broken down giving rise to a fixed amount of energy which can drive the endothermic reactions taking place in the cell. Reason (R): Life processes such as contraction of muscles, conduction of nerve impulse, etc. requires this energy.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): The rate of breathing in aquatic organisms is much slower than that seen in terrerstrial organisms. Reason (R): The amount of energy dissolved in water is very low as compared to the amount of oxygen in air.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Lungs always contain a residual volume of air. Reason (R): It provides sufficient time for oxygen to beabsorbed and for carbon dioxide to be released.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Haemoglobin is the respiratory pigment in human beings. Reason (R): It is responsible for red colour of RBC's.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Aerobic respiration pathway depend on oxygen. Reason (R): Aerobic respiration occurs in the cytoplasm of a cell.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Gaseous exchange in leaves takes place by diffusion through stomata. Reason (R): The direction of diffusion mainly depends upon the environmental conditions and requirements of a plant.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Pharynx passes air into Larynx. Reason (R): Pharynx produces sound.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): During inhalation, diaphragm flattens and increases chest cavity. Reason (R): Expansion of the chest cavity creates a partial vaccum in the chest cavity.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Exchange of oxygen and carbon dioxide occurs between blood vessels and alveoli. Reason (R): Oxygen diffuses from alveoli to blood vessels and carbon dioxide diffuses from blood vessels to alveoli.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Interauricular septum seperates left atrium from right atrium. Reason (R): Interventricular septum seperates left ventricle from right ventricle.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): The walls of atria are thicker than those of the ventricles. Reason (R): Ventricles have to pump blood to various organs at high pressure.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Left atrium receives oxygenated blood from pulmonary vein. Reason (R): Right atrium transfers deoxygenated blood to the right ventricle which pumps it to the lungs for oxygenation.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): All the arteries carry oxygenated blood from the heart to various organs. Reason (R): Pulmonary vein carries oxygenated blood to the heart.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Capillaries have walls that are just one cell thick. Reason (R): Exchange of materials between blood and surrounding cells takes place across the capillaries.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Amphibians can tolerate mixing of oxygenated and deoxygenated blood. Reason (R): Amphibians are animals with two chambered heart.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Transpiration helps in the absorption and upward movement of water and minerals dissolved in it from roots to the leaves. Reason (R): Evaporation of water molecules from the cells of a leaf creates a suction which pulls water from the xylem cells of the roots.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Translocation of sugar occurs through the phloem. Reason (R): It is achieved by diffusion of sugars through phloem.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Blood clotting prevents the leakage of blood from the site of an injury. Reason (R): It reduces the loss of blood from the system.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Reduction in number of blood platelets can lead to excessive loss of blood from the body incase of any injury. Reason (R): Platelets help in the coagulation of blood.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Blood is a red-coloured fluid. Reason (R): The heart pumps blood into the arteries.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Left atrium receives oxygenated blood from the lungs by pulmonary vein. Reason (R): In the lungs, deoxygenated blood is purified and oxygenated blood is carried in pulmonary artery.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Translocation of solutes takes place across the phloem. Reason (R): Solutes can be translocated both in upward and downward directions.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Excretion is the biological process by which harmful wastes are removed from an organisms body. Reason (R): The mode of excretion is same in both unicellular and multicellular organisms.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): The main organ of human excretory system is kidney. Reason (R): Kidneys perform the function of removing excess water and nitrogenous wastes from the body.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Egestion is the removal of nitrogenous waste products from the body. Reason (R): In human beings, the excretory products in the form of soluble nitrogen compounds are removed by the nephrons in the kidneys.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): In case of kidney failure, artificial kidney can be used. Reason (R): Reabsorption does not occur in artificial kidney.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Resins and gums are stored in old xylem tissues in plants. Reason (R): Resins and gums facilitate transport of water molecules.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Urine formed, enters the urter through the kidneys. Reason (R): It is temporarily stored in urinary bladder.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Ultrafiltration involves filtration of blood under high pressure. Reason (R): Reabsorption of major amount of water occurs in tubular part of the nephron.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Human kidneys are asymmetrical in position. Reason (R): The right kidney is slightly lower than the left kidney.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Tubular secretion is an important step in the urine formation which occurs in nephron. Reason (R): It helps in the maintenance of ionic balance in the body.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Useful plant wastes are essential oils, tannins, gums, resins, natural rubber etc., Reason (R): Rubber plant is the common example of a plant which exudes latex (used in tyre industry) as an excretory product.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

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