Page 78: EBD_7166, 74,, 35.,, 36.,, 37.,, Assertion Reason Question Bank, (c) Co-enzymes are also organic compounds, but their association with the apoenzyme, is only transient, usually occurring during, the course of catalysis. Cattle in, these and adjoining areas will die due to, lack of fodder. The, immune response to a transplanted organ, consists of both cellular(lymphocyte, mediated) and humoral (antibody, mediated) mechanisms. It is known as evident, plasmolysis. C) The medulla contains centres which, control respiration, cardiovascular reflexes, and gastric secretions. It is, responsible for sleep and shock, movements of certain leaves, e. Assertion reason question on grade 11 placentation and use. g., Mimosa, pudica and Cassia., Venation is the arrangement of veins and, the veinlets in the lamina of leaf. The objectives of, protein engineering are to create superior, enzymes to catalyze production of high, value specific chemicals and to produce, enzymes for large scale use., (d) From hyperimmunized animals, the blood, serum may be taken and antibodies may be, isolated from this serum. C) Haemophilia also known as bleeder disease, is an example of recessive sex linked, inheritance in human beings. When the apical bud is, removed, the lateral buds sprout. The muscles, of heart wall are the cardiac muscles which, are unfatiguable and show rhythmic and, automatic contractions. The annual net, primary productivity of the whole, biosphere is approx.
The main cause of the, intestinal infection is improperly cooked, food. Bio] (a) How are variations useful for species if there is drastic. Page 284: EBD_7166, 280,, Assertion Reason Question Bank,, Chapter,, 38,, Environmental Issues,, Directions: In th e followin g questions, a, statement of assertion is followed by a statement, of reason. This leads to, expulsion of the baby out of the uterus, through the birth canal.,, Assertion Reason Question Bank, 59. B),, constant from generation to generation in, the absence of mutation, selection and, gene flow. The, reaction involves the same series of events, as in cough reflex, but the air explodes out, both through nose and mouth, expelling the, foreign matter from nasal passages., In most animals, tissue oxidation are carried, out by aerobic respiration.
The, genetic mother is available for another, superovulation. Moreover, in closed circulatory system, the blood, flows far more rapidly in closed blood, vesssels than in wide open channels and, body cavities. The ECGs obtained from, different individuals have roughly the same, shape and any deviation from this shape, shows a possible abnormality or disease., For example, the enlarged Q and R waves, indicate a myocardial infarction,, enlargement of the P wave shows, enlargement of the atria. The top stratum is occupied by, trees reaching a height of 30–40 m. There, is an understorey of small trees, an, intermediate stratum of shrubs and a, ground stratum made of herbs, grasses,, ferns, mosses and lichens. Page 155: Chemical Co-ordination and Integration, 17. Assertion: Holoblastic cleavage with almost equal sized blastomeres is a characteristic of placental animals.Reason: Eggs of most mammals, including humans, are of centrolecithal type. Breathing and Exchange of Gases,, 119-123,, 18. It is, responsible for production of various, hormones like human Chorionic, Gonadotropin (hCG), estrogen,, progesterone, human placental lactogen, (hPL)., 44.
Materials are, exchanged between epithelial cells and, vessels of the connective tissues by, diffusion across the basement membrane., Also, epithelial tissues exchange materials, through osmosis and filtration, (e. g., epithelial tissues of pulmonary vein,, Bowman's capsule etc. B) Plants do lack excretory organs, but it is, not due to absorption pattern or passive, life. 2., Reason: The value of Z i. e., slope of line of, species area relationships lies in the range of 0. It is adapted for, terrestrial habitats. Assertion reason question on grade 11 placentation takes. D) Assertion is false but Reason is true. CAM plants fix CO2 at night, because their stomata are open at night and, closed during the day., (b) Plants that utilize primarily RuBP to fix CO2,, (which results in the formation of the threecarbon compound 3-PGA), are called C3, plants. Thus,, a single tRNA type is able to recognize two, or more codons differing only in the third, base. Assertion: A tumor of adrenal cortex may cause, Addison's disease., Reason: This happens due to over secretion of, cortisol by the tumor., 21. The rest of it is, passed out of the body in urine and your, exhaled breath. Coral reefs are, formed through the accumulation of, calcareous exoskeletons of coral animals,, calcareous red algae and molluscs. Each part of, plant takes care of its own needs of, gaseous exchange. Unlike other methods of birth, control, barrier methods these are used only, during sexual intercourse., Reusable contraceptives do not guarantee, prevention from accidental pregnancy., Diaphragms, cervical caps and vaults are, barriers made of rubber that are inserted, into the female reproductive tract to cover, the cervix during coitus. After attaining a certain, stage of growth, the young ones are, delivered out of the body of the female, organism.
Receptors associated with aortic, arch and carotid artery also can recognize, changes in CO2 and H+ concentration and, send necessary signals to the rhythm, centre for remedial actions. The cells are shaped like a, crescent or sickle. The, progeny may be used for commercial, production. A) Morula involves cleavage of cells till 32, cell stage is formed. The connective tissue, consists of living cells and extra-cellular, matrix. Page 47: 43,, Morphology of Flowering Plants, 27. In birds,, shedding and replacement of feathers is, moulting or ecdysis which takes place, gradually, that is, about six weeks on an, average. Assertion: IgM is a type of immunoglobulin which cannot cross the placenta. Reason: IgM is pentamer immunoglobulin, joined by J chain. This gives us a 3-dimensional, view of a protein.
These hormones increase, alertness, pupillary dilation, piloerection,, sweating, etc. They need not be, repressed. They are pine,, fir, hemlock, spruce, jumper, yew, larch,, deodar. Assertion: The scale leaves present on the long, shoots are called cataphylls., Reason: Cataphylls lack mid rib., 49. Cultivation of, petroplants is a part of energy- cropping. Assertion reason question on grade 11 placentation english. A) One heart beat completes in 0. Assertion: Pancreas is a heterocrine gland., Reason: Endocrine part secretes insulin and, glucagon and exocrine part secretes an acidic, pancreatic juice containing enzymes., 27.
A) In prokaryotes, three initiation factors are, present – IF1, IF2, IF3. Co-enzymes serve, as cofactors in a number of different enzyme, catalyzed reactions. This is called, coextinction, e. when a host fish species, becomes extinct, its unique assemblage of, parasites also becomes extinct., Over exploitation or over-harvesting of a, plant or an animal species reduces the size, of its population leading to its extinction., Over-exploitation is one of the major causes, threatening global biodiversity. It bears a mass of small sessile flowers, (florets) on its surface, with one or more, whorls of bracts at the base forming an, involucre., The florets are arranged in a centripetal, fashion, i. e., younger towards the centre, and older towards the periphery. They, come to flower and bear fruits prior to end, of growing season. Assertion: Blood is colourless in insects., Reason: Insect blood has no role in O2 transport., 32. Assertion: The mechanism of DNA replication, is semiconservative in nature., Reason: Each of the complementary strands of, the parental double helix is conserved during, the process., 18. T cells of immune, system mainly function to kill non-self cells., Because cyclosporin A inhibits T cells, function, it causes immunosuppression, and chances of rejection of transplanted, organ are reduced. Because, of this light mediated response, the pineal, gland may act as a kind of 'biological clock', which may produce circadian rhythms, (variations following a 24 hour cycle).
The, heartwood does not conduct water but it, gives mechanical support to the stem. The lateral thoracic wall, moves outward and upward., Aerobic respiration involves the exchange, of respiratory gases at two places in, muticellular animals-one between the body, surface and surrounding medium, the other, between the individual cells and the, extracellular fluid. However,, translocation of organic molecules like sugar, takes place through phloem and another, conductive tissue., Water molecules are held together by strong, cohesion force which is because of, hydrogen bonds amongst them. Assertion: Mitochondria and chloroplasts are, semi autonomous organelles., Reason: They are formed by division of preexisting organelles as well as contain DNA but, lack protein synthesizing machinery, [AIIMS 2005, 2014], 32. G., ABA., Antitranspirants will maintain a favourable, internal water balance even in cases of very, low water availability. Page 153: Neural Control and Coordination, transmission of sound waves to the inner, ear., 46. Have evolved for the first, time. Locomotion and Movement,, 137-141,, 21. D),, correct identification. IgM cannot cross the placenta from the mother to the foetus.