Question 1The number of cranial nerves that connect the brain to various parts of the body is A.10 pairsB.11 pairsC.12 pairsD.13 pairs Objective Show full explanation
Question 2The following pair of ions is involved in transmission of impulse by neurons: A.K and Na ionsB.Na and Mg ionsC.K and Cl ionsD.K and Ca ions Objective Show full explanation
Question 3The probability of producing an heterozygote progeny in a cross between two heterozygote individuals of pea plant is A.1/3B.1/4C.1/2D.2/3 Objective Show full explanation
Question 4One of these does not protect the body from harmful effect of disease — causing micro —organisms A.anti toxinB.phagocytesC.antigensD.antibodies Objective Show full explanation
Question 6One of these is not a major Biome in West Africa A.Rain forestB.SavannaC.Coniferous forestD.Mangrove Objective Show full explanation
Question 7The media of transportation in living things include all but A.CytoplasmB.WaterC.EosinD.Blood and lymph Objective Show full explanation
Question 8Gaseous exchange through the lungs is called A.cutaneous breathingB.buccal breathingC.pulmonaryD.larynxial breathing Objective Show full explanation
Question 9In saprophytic mode of nutrition A.organisms feed on insoluble organic materialB.decomposition is not possible at allC.nutrient recycling is possibleD.no animals is involved Objective Show full explanation
Question 10A macro element which is not directly connected with formation of chlorophyll is A.nitrogenB.ironC.magnesiumD.sulphur Objective Show full explanation
Question 11During the light dependent reaction A.glucose is formedB.carbon IV oxide is fixedC.NADPH and ATP are synthesized using electron released from waterD.water is split and the electrons produced are used for glucose synthesis Objective Show full explanation
Question 12Eutrophication refers to growth of ..... A.BacteriaB.FungiC.ProtophytesD.Algae Objective Show full explanation
Question 13All the following statements are consistent with the concept of trophic structure except A.at every feeding stage, some energy is wasted from the chainB.the nearer the organism to the beginning of a food chain, the greater the available energy of the organismC.the first trophic level is occupied by the autotrophsD.there are few number of organisms at the start of a food chain Objective Show full explanation
Question 14All these statements about plants succession are correct except A.plant succession is the process of community change at one place over timeB.plant succession is usually measured over the course of several years to hundred yearsC.succession proceeds from pioneer to climax phasesD.succession is often not directional and so difficult to predict Objective Show full explanation
Question 15Which of the following is not true about finger print? A.It is useful in detecting crimeB.No two individuals have the same finger printC.It is a heritable characterD.It is environmentally induced Objective Show full explanation
Question 16Characteristics of continuous variation include all of the following except A.produced by many genesB.influenced by the environmentC.occurs in a normal distribution curveD.most of the organisms in the population fall at the tall ends of the range Objective Show full explanation
Question 17Homeostasis is defined as A.Regulation of both external and internal conditions of organismsB.maintenance of internal environment of an organismC.maintenance of internal and external environment of an organismD.Regulation of the chemical environment of an organism Objective Show full explanation
Question 19The mechanism of opening and closing the stomata is associated with the A.guard cellsB.stomaC.lenticelsD.air spaces Objective Show full explanation
Question 20The part of the kidney where each tubule begins is called A.capsuleB.cortexC.glomerulusD.urether Objective Show full explanation
Question 21The factors for two pairs of contrasting characters are inherited independent of each other. This is A.Mendel's first law of inheritanceB.Mendel's second law of inheritanceC.Mendel's law of segregation of germinal unitsD.Mendel's law of independent pairing of germinal units Objective Show full explanation
Question 22All of the following green algae are colonial forms except? A.GoniumB.VolvoxC.PandonnaD.Anabaena Objective Show full explanation
Question 23Allste is A.an alternate form of a geneB.a unit of inheritanceC.the position or location of the gene on a chromosomeD.number of chromosomes in the gamete Objective Show full explanation
Question 24One of these statements about sympathetic Nervous system is untrue A.it stimulates many parts of the body in times of dangerB.it stimulates the heart beatC.it functions like the adrenal glandsD.it lowers the blood pressure Objective Show full explanation
Question 25One of the following elements is not associated with leaf chlorosis A.NitrogenB.ironC.CalciumD.Magnesium Objective Show full explanation