Assertion: Amphibians are poikilothermal., Reason: Amphibians often undergoes summer, sleep., 70. A species is a collection of, demes. Page 143: 139,, Locomotion and Movement,, Solutions, 1.,, 2.,, 3.,, 4.,, 5.,, (b) Main movement found in unicellular, organisms are ciliary, flagellar and, amoeboid movements. It is mainly the source, of fibre. The portion of the myofibril, between two successive 'Z' lines is, considered as the functional unit of, contraction and is called a sarcomere., During contraction, the 'Z' lines attached, to the actins are pulled inwards thereby, causing a shortening of the sarcomere, i. e.,, contraction. Page 28: EBD_7166, 24,, 46.,, 47.,, 48.,, 49.,, 50.,, 51.,, 52.,, Assertion Reason Question Bank, (b) Indusium is an membranous epidermal, outgrowth covering the sori in some ferns., The coenosorus is surrounded by two well, formed indusial lips, between which the, receptacle lies. Assertion: IgM is a type of immunoglobulin which cannot cross the placenta. Reason: IgM is pentamer immunoglobulin, joined by J chain. It is, however, liable to be, attacked by wood rotting fungi. It, provides information about data and place, of collection., Herbarium is also known as "Dry garden"., It is a collection of plant parts that have, been dried, pressed and preserved on, sheets. This can prevent, conception.,, 22. Assertion: Nitrogenase enzyme gets inactivated, in presence of oxygen yet N2 fixation occurs in, aerobic cells of legume nodules., Reason: Leghaemoglobin allows presence of, oxygen just sufficient for cellular respiration, only., 29.
Assertion Reason Question On Grade 11 Placentation Definition
Only the chalazal megaspore, remains functional Megaspore enlarges and, gives rise to female gametophyte, also called, embryo sac., 39. Notochord is, present and they are less developed than, craniates., Hemichordates are worm-like marine, animals. Chyme passes, rapidly through the small intestine and faeces, in the large intestine. Assertion reason question on grade 11 placentation definition. In cymose inflorescence,, the terminal flower is always older and, opens earlier than the lateral ones, i. e., the, order of opening of flowers is centrifugal., Compound umbel is branched umbel, where, several small or daughter umbels arise from, a common point in an umbellate fashion. It uses, articles, photos and recommendations to, plant., All new species develop from the preexisting species.
Pore, size depends upon agarose concentration., In general, a 1% (w/v) gel will have a pore, size of 150 nm. Assertion: Ozone is a powerful oxidizing agent, in comparison to O2., Reason: Ozone is diamagnetic but O2 is, paramagnetic., 41. Page 282: EBD_7166, 278,, 39. Assertion: Industrial melanism of Biston, betularia is an example adaptation., Reason: The mutation saved their population., 70.
Assertion Reason Question On Grade 11 Placentation In Tomato
B) The tendency for competition to bring, about an ecological separation of closely, related, or otherwise similar species is, known as the competitive exclusion, principle (Hardin, 1960) phenomenon, is also called as Gause's principle. It then develops directly into an, embryo without the prior fertilization. In warm, weather, the feathers are often held close, to the body to allow some escape of body, heat., Pigeon is a bird species known to produce, milk even though they lack mammary, glands. Food, reaches every cell of an organism for, respiration to take place. Action of, these muscles is controlled by autonomic, nervous system., 34. Thus, by, using the antibodies specific to bind with, those antigens their infection can be, detected. Symport and, antiport are two types of co-transport., Symport allows both the molecules to move, in same direction and antiport allows both, the molecules to move in opposite direction., (a) The pressure which develops in the confined, part of an osmotic system due to osmotic entry, of water into it is called turgor pressure. Page 81: 77,, Cell cycle and Cell Division,, Solutions, 1.,, 2.,, (c) Previously interphase was called resting, stage because there is no apparent activity, related to cell division. Assertion reason question on grade 11 placentation english. The two daughter DNA, molecules thus, formed will be carbon, copies of the parent molecule but shall, have one new strand and one old strand.,, 197,, 18. Assertion: Binomial nomenclature is system of, providing name with two., Reason: Each name consists first of a specific, name and second of a generic name., 26.
One of their, functions is stimulation of tissue, differentiation. Hence,, these persons can donate blood to anyone., O blood group is the most important blood, group for transfusion., (d) When an injury is caused to a blood vessel,, bleeding starts which is stopped by blood, clotting. Assertion: Glochindium larva rapidly disperse, to a great distance., Reason: Glochindium is parasitic on fish., 52. Plants obtain sulphur in the form of, sulphate (SO42–). The, mammary glands are paired structures, (breasts) that contain glandular tissue and, variable amount of fat. Assertion Reason Questions for Biology Chapter 24 Sexual Reproduction in Flowering Plants. C) Organs of aquatic plants are made of a, special parenchyma tissue known as, aerenchyma. Toddy left, for few hours undergoes fermentation with, the help of naturally occurring yeast to form, beverage containing about 6% alcohol.
Assertion Reason Question On Grade 11 Placentation English
Leaves, of dicotyledonous plants generally possess, reticulate venation, while parallel venation, is the characteristic feature seen in most, monocotyledons., Phyllotaxy is the arrangement of leaves on, the stem or branch. A),, muscles and gland to stimulate or inhibit, their activities. Assertion: Syphilies, gonorrhoea and AIDS are, STDs., Reason: These diseases are transmitted through, sexual intercourse., 28. AIIMS 2009], Assertion: Glycolysis occurs in cytoplasm.,, 7.,, 8.,, 9.,, 10.,, 11.,, Reason: Enzymes for glycolysis are found in, cytoplasm. It is better than, conventional insulin because conventional, insulin produces many side effects over a, long period., Second generation vaccines were, developed to reduce the risks from live, vaccines. Page 71: 67,, Cell: The Unit of Life, 26. Assertion reason question on grade 11 placentation and coding. This is caused by the wear and, tear of organs which constitute the body, of a living being., 61. Assertion:When the ambient temperature is, high and soil contains excess of water, the plants, tend to lose water in the form of droplets from, lenticels., Reason: Root pressure regulates the rate of loss, of water form lenticels., [AIIMS 2006], 16.
Enzymes lower the activation, energy required for a reaction. B),, pCO2 is low, the reaction proceeds in the, opposite direction leading to the formation, of CO2 and H2O., Chloride shift is the movement of chloride, ions (Cl–) into red blood cells. A) According to programmed senescence, theory of ageing, ageing is a result of, switching on and off of certain genes. Assertion: Order is a taxonomic category that, includes one or more genera., Reason: All the genera in an order have some, similar features and correlated characters., 35. Assertion: When the availability of the essential, nutrients falls below the cirtical concentration, deficiency symptoms appear., Reason: Critical concentration is that limited, concentration of the essential element below, which growth of the plant is reduced., 21. Assertion: Mango is a true fruit., Reason: The thalamus also contributes to, formation of fruit in false fruits., 54. The cork cells, contain tannins. B) Wall of a pollen grain consists of two, layers– outer exine and inner intine. The force exerted by the cell wall over, the protoplast is called wall pressure. If degeneration of, tapetum occurs earlier than usually the, spores are deprived of nutrition and as a, result the pollen grains released are sterile., Self-incompatibility is the inability of pollen, from a flower to germinate on the stigma of, the same flower (or other flower of same, plant). Bio] (a) How are variations useful for species if there is drastic. Sapwood, (outer light coloured wood) is less durable, because it is susceptible to attack by, pathogens and insects., Trichomes are unicellular or multicellular, outgrowths which are strictly epidermal in, origin. If drugs are taken, for a longer period of time they increase, the number of receptors at neuronal, junctions., 77.
Assertion Reason Question On Grade 11 Placentation And Coding
E-wastes are buried in landfills or, incinerated. They show Kranz anatomy i. e., vascular bundle is surrounded by bundle, sheath and mesopyll cells., 34. Assertion: Bioenergy is the energy available, from biological sources., Reason: Fossil fuels are examples of bioenergy., 18. They are interesting, not only in that they provide a locally, segregated environment but also in that their, boundaries allow the selective absorption, of simple organic molecules from the, surrounding medium. The ovum is drawn, into fallopian tube.
A) The spadix contains a large green or, coloured bract called spathe. Development in plants is, under control of both intrinsic and extrinsic, factors. It means, the inner, side of plasma membrane of the cell, becomes more positively charged with, respect to the outer side of plasma, membrane. Tribals living in, these areas will starve to death. It is inert, outside the host cell. The protoplasm is, vacuolated., (d) Sporozoans are endoparasites.
Assertion Reason Question On Grade 11 Placentation In Plants
B),, (e. g., – parts of New Zealand). The vascular bundles, are, therefore, conjoint, collateral and, closed., 36. Therefore,, transpiration increases in light and decreases in, dark., [AIIMS 1999, 2015], 17. These sperms lysins contain a, lysing enzyme hyaluronidase which, dissolves the hyaluronic acid polymers in, the intercellular spaces which holds the, granulosa cells of corona radiata together;, corona penetrating enzyme and acrosin.
Page 163: 159,, Reproduction in Organisms,, 17.,, (b),, 18.,, (b),, 19.,, (d),, 20.,, 21.,, 22.,, (c),, (c),, (b),, Monocots do not have a vascular cambium,, which is needed for the process to work., Clones are genetically and morphologically, similar to parent. The rest of it is, passed out of the body in urine and your, exhaled breath. Besides functioning as a, temporary reservoir of urine, the urinary, bladder also evacuates the urine by the,, process of micturition at suitable intervals., When enough urine has accumulated in, the bladder to distend the bladder and raise, its pressure sufficiently, a spontaneous, nervous activity (reflex) is initiated; this, causes the smooth muscles on the bladder, wall to contract and the urethral sphincters,, which guard the urethra, to relax. It is a green house, gas whose concentration is double now, than it was 250 years ago. Changing the time, of sowing can exploit weather conditions. However,, nature keeps a check on the expression of, biotic potential. They also help, in secretion processes to increase the, surface area of the plasma membrane and, enzymatic content., Cell wall is characteristic feature of plant cells., Cell wall is absent in animals. The, adelphous stamens are fused by their.
Assertion Reason Question On Grade 11 Placentation And Learning
These are spherical species small, and large, contain water and food in various, phases of digestion. Due to closed, circulatory system, blood is confined to the, heart and blood vessels. Thus these valves resemble swing, doors in action. Assimilatory, powers are required for the reduction of, CO 2. Manganese, competes with iron and magnesium for, uptake and with Magnesium for binding with, enzymes. Reason: Xenogamy is pollination between two flowers on different plants. It exists as, octamers linked with H1.,, 7.,, (a) A chain of DNA has 140 base pairs, make, 3, 1 turns and twist around a histone, 4, octamer forming nucleosome. Page 269: 265,, Ecosystem,, 12.,, (c),, 13.,, (a),, 14.,, (b),, 15.,, (c),, 16.,, (a),, angiosperms, or flowering plants, have a, protein that can sense seasonal changes, in light. The internal factors are, dependent on the genetic composition and, the growth of the plant. Fusion, of filaments may produce one bunch or, bundle and is called monodelphous e. g.,, china rose. These substances make, it hard, durable and resistant to the attacks, of microorganisms and insects. And some algae (e. g.,, Chlamydomonas Ulothrix)., Asparagus has fleshy roots which develop, adventitious buds. Keys are, generally analytical in nature., Manuals are useful in providing, information for identification of names of, species found in an area. Assertion: Prokaryotic DNA is similar to, mitochondrial DNA., Reason: Mitochondrial are proved to have, evolved from the prokaryotes., 60.
A) Collenchyma cells are elongated cells with, irregularly thick cell walls that provide, support and structure. Bacteria, Protista, do not have circulatory system. It is carried on by an, extensive system of inter-communicating, tubes called tratrachea., Bohr, s effect is the effect of CO 2 on, oxyhaemoglobin.