Question 1The nucleus is considered the central organelle of a cell because it A.contains the genetic materialB.contains the nuclear sapC.is bounded by the nuclear membraneD.is located at the center of the cellObjective Show full explanation
Question 2The prokaryotic cell type is characterized by A.complex cytoplasm in which different regions are poorly definedB.localization of different regions of the cell into issuesC.collection of organelles and macromolecular complexesD.simple cytoplasm with well defined regionsObjective Show full explanation
Question 3The natural tendency of organisms as they evolves is to A.decrease in sizeB.increase in numberC.develop specialized structuresD.feed indiscriminatelyObjective Show full explanation
Question 4In snails, the hard calcareous shells are secreted by the A.radiusB.tenidiumC.pneumostomeD.mantle Objective Show full explanation
Question 5The ability of the cockroach to live in cracks and crevices is enhanced by the possession of A.wings and segmented bodyB.compound eyesC.claws on the legsD.dorso-ventrally flattened bodyObjective Show full explanation
Question 6The caste of termites that lacks pigmentation is the A.kingB.workerC.soldierD.queen Objective Show full explanation
Question 7The structures that prevent food particles from escaping through the fish gills are called gill A.archesB.filamentsC.rakersD.lamellaeObjective Show full explanation
Question 8A distinguishing feature of mammals is the possession of A.skinB.scaleC.nailD.hairObjective Show full explanation
Question 9Which of the following structures is capable of producing more tissues in the stem of a herbaceous flowering plant? A.epidermisB.pericycleC.xylemD.cambiumObjective Show full explanation
Question 10The manufacture of carbohydrates by plants takes place only in A.the leavesB.the green stemsC.chlorophyllous partsD.flowering plantsObjective Show full explanation
Question 11In a water culture experiment a plant showed poor growth and yellowing of the leaves. These may be due to deficiency of A.copperB.ironC.magnesiumD.calciumObjective Show full explanation
Question 12In Million's test, when the reagent is added to a protein food item, a white precipitate is produced which turns A.blue on heatingB.yellow on heatingC.green on heatingD.red on heating Objective Show full explanation
Question 13Regulation of blood sugar level takes place in the A.pancreasB.ileumC.liverD.kidneyObjective Show full explanation
Question 14Unicellular or or bariums transport essential nutrients directly to all parts of their bodies by the process of diffusion because they have A.a large volume to surface area ratioB.a large surface area to volume ratioC.bodies immersed in the nutrientsD.their outer membrane made of cellulose. Objective Show full explanation
Question 15The heart of the adult frog consists ofA.one ventricle and one auricleB.two ventricles and two auriclesC.two ventricles and one auricleD.one ventricle and two auricles Objective Show full explanation
Question 16In adult mammalian blood, the cells which lack nuclei are theA.erythrocytesB.lymphocytesC.leucocytesD.phagocytesObjective Show full explanation
Question 17Which of the following movements occur during exhalation?A.The diaphragm and intercostal muscles relaxB.the thoracic cavity increases in volumeC.the diaphragm and intercostal muscles contractD.earthworms, roundworms and flatworms.Objective Show full explanation
Question 18In which of the following groups of animals is the malphigian tubule found?A.Lizards, snakes and frogsB.Crickets, houseflies and grasshoppersC.Millipedes, centipedes and scorpionsD.Earthworms, roundworms and flatwormsObjective Show full explanation
Question 19Which of the following is not a function of mammalian skeletonA.ProtectionB.RespirationC.TransportationD.SupportObjective Show full explanation
Question 20The most reliable estimate of growth is by measuring changes inA.lengthB.volumeC.surface areaD.dry weightObjective Show full explanation