ASSERTION AND REASON Class 10 – biology Welcome to your ASSERTION AND REASON Class 10 - biologyAssertion (A): In xylem, vessels and tracheid’s are inter connected to form a continues system of water conducting channels. Reasoning (R): Root hair cells release ions. Choose the correct option A is correct and R is the correct explanation of A. A is correct and R is not the correct explanation of A. A is correct and R is wrong. A is wrong and R is correct. None Assertion (A): Loss of water from aerial parts of the plant is known as transpiration.Reasoning(R): During the day when the stomata are open, the transpiration pull becomes the majordriving force in the movement of water in the xylem.Choose the correct answer A is correct and R is the correct explanation of A. A is correct and R is not the correct explanation of A. A is correct and R is wrong. A is wrong and R is correct. None Assertion(A): CO2diffuses out of amoeba when it starts accumulating to harmful levels in the cell.Reasoning(R): In large organisms, diffusion alone is far too slow for adequate distribution of oxygen andfood. A is wrong and R is correct. A is correct and R is wrong. A is correct and R is not the correct explanation of A. A is correct and R is the correct explanation of A. None Assertion(A): Fihses are called ammoniatelic animalsReasoning(R): They contains nephrons which filter the blood and form the urine and large amount ofammonia is found in fish excreta. A is correct and R is the correct explanation of A. A is correct and R is not the correct explanation of A. A is correct and R is wrong. A is wrong and R is correct. None Assertion (A): Mammals are called ureotelic animals.Reasoning (R): In mammals urea is the main excretory products so they are called ureotelic animals. A is correct and R is the correct explanation of A. A is correct and R is not the correct explanation of A. A is correct and R is wrong. A is wrong and R is correct None Assertion (A): Medullated nerve cells appears greyish in colour.Reasoning (R): This neuron is not enclosed by myelin sheath; so it appears greyish in colour. A is correct and R is the correct explanation of A. A is correct and R is not the correct explanation of A. A is correct and R is wrong. A is wrong and R is correct None Assertion(A): The inner part of the cerebrum lying below the cerebral cortex is called white matter.Reasoning(R): It consists of bundles of nerve fibres with myelin sheath giving the white colour. A is correct and R is the correct explanation of A. A is correct and R is not the correct explanation of A. A is correct and R is wrong. A is wrong and R is correct None Assertion(A): Less production of ADH causes Diabetes insipidus.Reasoning(R):It helps in the reabsorption of water, producing concentrated urine in small quantity A is correct and R is the correct explanation of A. A is correct and R is not the correct explanation of A. A is correct and R is wrong. A is wrong and R is correct None Assertion(A): Aldosterone is called mineralocortoid.Reasoning(R): Cortisone is called glucocortoid. A is correct and R is the correct explanation of A. A is correct and R is not the correct explanation of A. A is correct and R is wrong. A is wrong and R is correct. . None Assertion (A): Aldosterone maintains mineral metabolism.Reasoning (R): Cortisone stimulates the breakdown of glycogen into glucose raising the bloodglucose level. A is correct and R is the correct explanation of A. A is correct and R is not the correct explanation of A. A is correct and R is wrong. A is wrong and R is correct. None Statement - I: Sexual reproduction takes place by the combination of special reproductive cells called‘sex cells’.Statement – II: The sex cells are commonly known as gametes. Statement - I is true, Statement - II is false. Statement - I is false, Statement - II is true. Both statements are true. Both statements are false None Statement - I: In sexual reproduction, a male gamete fuses with a female gamete to form a new cellcalled Embryo.Statement – II: The sex cells or gametes are also sometimes called germ cells. Statement - I is true, Statement - II is false. Statement - I is false, Statement - II is true. Both statements are true. Both statements are false None Assertion(A): Sexual reproduction in plants take place in flower. Reasoning(R): Both male and female reproductive organs are present in flower itself. A is wrong and R is correct. A is correct and R is wrong. A is correct and R is not the correct explanation of A. A is correct and R is the correct explanation of A. None Assertion (A):Self pollination is known as autogamy.Reasoning (R):This is because pollen grains from the anther of a flower to the stigma of the same flower or another flower of the same plant are tranferred. A is correct and R is the correct explanation of A. A is correct and R is not the correct explanation of A. A is correct and R is wrong. A is wrong and R is correct. . None Assertion(A): A geneticist crossed two pea plants and got 50% tall and 50% dwarf in the progeny.Reason (R) : One plant was heterozygous tall and the other was dwarf. Both A and R are true and R is the correct explanation of A. Both A and R are true but R is not the correct explanation of A. A is true but R is false. A is false but R is true. None Assertion(A) : Variations are seen in offspring produced by sexual reproduction.Reason (R) : DNA molecule generated by replication is not exactly identical to original DNA. Both A and R are true and R is the correct explanation of A. Both A and R are true but R is not the correct explanation of A. A is true but R is false. A is false but R is true. None Assertion(A) : Mutation is sudden change in the genetic material.Reason (R) : Variation is useful for the survival of species over time. Both A and R are true and R is the correct explanation of A. Both A and R are true but R is not the correct explanation of A. A is true but R is false. A is false but R is true. None Assertion(A): Mendel selected the pea plant for his experiments.Reason (R) : Pea plant is cross-pollinating and has unisexual flowers. Both A and R are true and R is the correct explanation of A. Both A and R are true but R is not the correct explanation of A. A is true but R is false. A is false but R is true. None Assertion(A): The sex of a child is determined by the mother.Reason (R) : Humans have two types of sex chromosomes: XX and XY. A is false but R is true. A is true but R is false. Both A and R are true but R is not the correct explanation of A. Both A and R are true and R is the correct explanation of A. None Assertion(A) : Evolution is an extremely slow process.Reason (R) : New characters are accumulated in an organism during its lifetime. Both A and R are true and R is the correct explanation of A. Both A and R are true but R is not the correct explanation of A. A is true but R is false. A is false but R is true. None Time's up Please Share This Share this content Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Leave a Reply Cancel replyCommentEnter your name or username to commentEnter your email address to commentEnter your website URL (optional) Save my name, email, and website in this browser for the next time I comment.
