4951 + Interview Questions in Biology in Class 10 Page 89 InterviewSolution

4401.	Question : An organism, which is connecting link betwee nanimals and plants, is
Answer» VIRUS Amoeba Euglena Noctiluca ANSWER :C

Discussion

4402.	Question : An organism which is a worm, has very simple 'eyes',thatare really eyes spots which detect light. Name theorganism.
Answer» SOLUTION :PLANARIA

Discussion

4403.	Question : An organism having more than two sets of chromosomes is called polyploit aded by physical pents such as heat or cold treatment, -rays and chemical s like colchicine. Achievements of polyploidy breeding.
Answer» Solution :• SEEDLESS watermelons (3n) and bananas (3n). TV. 29 (triploid variety of teal with a sheats and drought tolerate .Triticale (6n) is a hybrid of what and ray. It has higher dietarty fibre and PROTEIN • Raplano BRASSICA is an ALLOTETRAPLOID by colchicine treatment 5. What is hybridiration?

Discussion

4404.	Question : An organ in earthworm analogous to our kidney
Answer» testis nephridium clitellum ovary ANSWER :B

Discussion

4405.	Question : An offpsing of two homozygous parents differing from one another by alleles at only one gene locus is :
Answer» BACK CROSS monohybrid dihybrid trihybrid Answer :B

Discussion

4406.	Question : An object 2cm tall is kept on the principal axis of a converging lens of focal length 8 cm. Find the position, nature and size of the image formed if the object is at 12cm from the lens. Also find the magnification produced by the lens.
Answer» Solution :Given: `h_0 = 2cm , F = 8CM ,u= -12cm , v ? ` ` 1/f = 1/v - 1/u` `1/v = 1/f + 1/u` `1/v = 1/8 - 1/12` `1/v = (3-2)/(24) = 1/24` Real and INVERTED Real and inverted `(h_i)/(h_0) = v/u` ` (h_i)/((2) = (24)/(-12)` ` h_i= - 48/12 = -4` `h_o = - 4` MAGNIFICATION ` = v/u = (24)/(-12) = -2 `

Discussion

4407.	Question : An old man is advised by his doctor to take less sugar in his diet. Name the disease from which the man is suffering. Mention the hormone due to imbalance of which he is suffering from this disease. Which endocrine gland secretes this hormone ?
Answer» Solution :The man is suffering from Diabetes mellitus. Hormone is insulin. ENDOCRINE gland that SECRETES insulin is PANCREAS.

Discussion

4408.	Question : An inexhaustible resources is.............
Answer» WIND power soil fertility wild LIFE all of the above Solution :all of the above

Discussion

4409.	Question :An individual cannot pass on to its progeny theexperiences of its lifetime “ Justify the statement with the help of an example and also give reason for tthe same
Answer» Solution :EXPERIENCE achieved during the life TIME of an individual does not MAKE any change in the gene ofthe individual for example, if a person reads a book on birds, the KNOWLEDGE he earns by reading the book does not make any changes in the gene, hence, this knowledge will not get automatically transmitted to his next generation, such a trait is called acquired trait

Discussion

4410.	Question : An illustration related to human evolution is given.Analyse it and answer the following questions: How does the comparative study of haemoglobin helped to idfentify the evolutionary relationship between man and chimpanzee?
Answer» ANSWER :No DIFFERENCE in the number of AMINO acids in the B CHAIN haeoglobin in MAN and chimpanzee.

Discussion

4411.	Question : An illustration related to human evolution is given.Analyse it and answer the following questions: Write the names of categories (i) and (ii)
Answer» ANSWER :i) Cercopethicoidea II)Hominoidea

Discussion

4412.	Question : An illustration related to human evolution is given.Analyse it and answer the following questions: Mention the two important characteristics of organisms belong to (ii).
Answer» ANSWER :Devoloped BRAIN, FREELY moveble HANDS

Discussion

4413.	Question :An example of homologous organs is ..............a.our arm and a dog's foreleg.b.our teeth and an elephant's tusks.c.potato and runners of grass.d.all of the above
Answer» our arm and a dog's FORELEG. our teeth and an elephant's tusks. POTATO and RUNNERS of GRASS. all of the above Answer :A::B::C::D

Discussion

4414.	Question : An example of homologous organs is
Answer» our ARAM and a dog's fore-log our teeth and an elephants's tusks. potato and runners of grass. all of the above. Solution :all of the above Explanation: Options a and b are homologous ORGANS, as we know that those organs have same origin and structure though their FUNCTIONS are different. Option - both potato and runners of grass are STEMS. So they are homologous too. Hence option d is the right answer.

Discussion

4415.	Question : An erythrocyte lives for approximately
Answer» ONE week one month four months one YEAR ANSWER :C

Discussion

4416.	Question : An enzyme which can only act in acidic me dium is
Answer» pepsin trypsin renin amylase ANSWER :A

Discussion

4417.	Question : An electric refrigerator rated 300 W is used for 8 hours a day. An electric iron box rated 750 Wis used for 2 hours a day. Calculate the cost of using these appliances for 30 days, if the cost of 1 kWh is Rs. 3/-
Answer» Solution :The TOTAL energy consumed by the refrigcrator in 30 days `=400xx8xx0= 96000 WH - 96 kWh` The total energy consumed by the iron box in 30 days `750xx2xx30 = 45000 Wh= 45 kWh` The total energy consumed by the refrigerator and iron box is `96kWh +45kWh-141 kWh` The surn of bill amount for 141 kWh at rate of RS. 3 PCR 1 kWh is `-141 xx 3 = Rs. 423`

Discussion

4418.	Question : An electric motor is taken out from a toy ear. How do you convert this motor into a small electric generator? Compare the function of electric generator with the phenomenon of electromagnetic induction.
Answer» SOLUTION :To convert an electric motor taken out from the toy car into a small electric generator we can follow these steps: Take the electric motor from the toy car out of the vehicle. Now connect some rotator cuff or anything so that the crank shaft can be rotated about its axis. Now connect an LED bulb or any small bulb with the input points of the electric motor. Now GO on rotating the crankshaft. The electricity will be generated from the motor as the motor will now start acting as Dynamo. The PHENOMENON which the motor is undergoing is termed as reverse electromagnetic induction in which the magnet is in the stationary position and the conductor ROTATES resulting in energy GENERATION. However, in electromagnetic induction the magnet moves and the conductor remains stationary

Discussion

4419.	Question : An electric geyser rated 1500W, 250 V is connected to a 250v line mains. Calculate the electric current drawn by it, energy consumed by it in 50 hours and energy consumed if each unit coast Rs. 6.00.
Answer» Solution :Given P= 1500W V=250V i) CURRENT drawn `I = (P)/(V)= (1500)/(250)= 6A` ii) Electric energy consumed by gyser in ` "50 hours" = "Power" xx "TIME"` `= 1500 xx 50 = 75000 wH` Since 1kwh = 1 UNIT 75kwh = 75units. Energy consumed = 75 units iii) Cost of one unit = 6.00 `"Cost 75 units" = 75 xx 6.00 = Rs.450.00`

Discussion

4420.	Question : An ecosystem resists change because it is in a state of
Answer» HOMEOSTASIS shortage of COMPONENTS DEFICIENCY of light IMBALANCE Answer :A

Discussion

4421.	Question :An ecosystem includes
Answer» all LIVING ORGANISMS non-living OBJECTS. both living organisms and non-living objects. SOMETIMES living organisms and sometimes non-living objects. Solution : An ecosystem INCLUDES both living and non-living organisms.

Discussion

4422.	Question : An ecosystem has producers. herbivores and carnivores but without which of following it is not complete?a.Secondary carnivoresb.Higher carnivoresc.Omnivoresd.Decomposers
Answer» SECONDARY CARNIVORES HIGHER carnivores Omnivores DECOMPOSERS Solution :Decomposers

Discussion

4423.	Question : An earthworm lacks
Answer» haemoglobin teeth nephridia PHARYNX ANSWER :B

Discussion

4424.	Question : An arthropod has all the following characteris tics except
Answer» BILATERAL symmetry pseudocoelom three EMBRYONIC germ layers protostome development ANSWER :B

Discussion

4425.	Question : An aquatic plant with floating leaves
Answer» has STOMATA on leaf SURFACE has stomata on lower smface has stomata has stomata only on UPPER surface ANSWER :D

Discussion

4426.	Question : An anticoagulant used for preventing clotting in vitro is sodium oxalate. It prevents clot formation by
Answer» combining with cations in the BLOOD inhibiting clotting factor VIII ACTIVITY getting itself deposited over the SURFACE of RBC blocking the fibrinogen activity ANSWER :A

Discussion

4427.	Question : An animal with a diet deficient in at least one essential nutrient is said to be
Answer» starving undernourished malnourished suffering from KWASHIORKOR disease Answer :C

Discussion

4428.	Question : An ammeter is always connected in series acrose a ciruit element what happens when it is connected in parallel with a circuit element.
Answer» Solution :An ammeter is LAW RESISTANCE device when it is connected in parallel the resistance of the CIRCUIT reduces consider BLU therefore a large current flows through the ciruit by virtue of circuit element may DAMAGE.

Discussion

4429.	Question : An American plant that had become a trouble- some watcrweed in India is
Answer» TRAPA bispinosa Cyperus rotundus EICHHORNIA crassipes Typha latifolia ANSWER :C

Discussion

4430.	Question : An alternating current has frequency of 50Hz. How many times it has changed its direction In one second.
Answer» SOLUTION :100 TIMES. 50 Hz FREQUENCY means AC generator completes 50 cycles in 1 second.

Discussion

4431.	Question : An allergic disease is,
Answer» RHINITIS Beri-beri Goitre Kwashiorkor Answer :A

Discussion

4432.	Question : Amrita Devi had sacrificed her life for the protection of ......... trees.a.khejrib.banyanc.pipald.pandanas
Answer» KHEJRI banyan pipal pandanas SOLUTION :khejri

Discussion

4433.	Question : Amount of O_(2) normally carried by 100 ml of pure blood, is
Answer» 40 ML 10 ml 20 ml 30 ml ANSWER :C

Discussion

4434.	Question : Amongst the following, which one is not a man made ecosystem :
Answer» NILGIRIS GARDEN Kitchen Garden RICE FIELD SOLUTION :Nilgiris

Discussion

4435.	Question : Amongst Planaria, Insect, Octopus, Invertebrates and Vertebrates, the evolution of which organ can be explained stepwise?a.Earsb.Wingsc.Eyesd.Feathers that develops
Answer» EARS WINGS EYES FEATHERS that DEVELOPS

Discussion

4436.	Question : Among the invertebrates, arthropods are unique in possessing
Answer» a notochord ventral NERVE cords open circulation jointed APPENDAGES ANSWER :D

Discussion

4437.	Question : Among the following, which plant is completely devoid of roots?
Answer» Ceratophyllum Hydrilla VALLISNERIA AZOLLA ANSWER :A

Discussion

4438.	Question : Among the following which lone is recently discovered non-leguminous nitrogen-fixing bacterium
Answer» Azospirillum Nitrosomonas Spirillum Rhizobium ANSWER :A

Discussion

4439.	Question : Among the following, which have posed a threat to the environment ? Body spray. bacteria. aerosols. CFCs, wild grass.
Answer» SOLUTION :BODY SPRAY, AEROSOLS. CFCS

Discussion

4440.	Question : Among the following ecosystems which one has the maximum biomass?
Answer» Pond ECOSYSTEM Lake ecosystem Grassland ecosystem FOREST ecosystem ANSWER :D

Discussion

4441.	Question : Among rust,smut and mushroom all the three
Answer» are pathogens are saprobes bear ascocarps bear BASIDIOCARPS ANSWER :D

Discussion

4442.	Question : Among pollutants that has the most lasting effect
Answer» CARBON monoxide pesticides SULPHUR DIOXIDE SMOKE from chimneys Answer :B

Discussion

4443.	Question : Among mammals, an herbivore has
Answer» more TEETH than CARNIVORE flatter teeth than carnivore teeth that are more POINTED than carnivore fever teeth than a carnivore ANSWER :B

Discussion

4444.	Question : Amoebic dysentery is caused by
Answer» ENTAMOEBA coli Entamoeba histolytica Entameoba gingivalis Amoeba PROTEUS ANSWER :B

Discussion

4445.	Question : Amoeba is alan
Answer» MASS of PROTOPLASM COMPLETE organism acellular complete organism cell ANSWER :B

Discussion

4446.	Question : Amoeba belongs to class
Answer» ciliophora sarcodina mastigophora sporozoa ANSWER :B

Discussion

4447.	Question : Amoeba and Leishmania reproduce by______________ .
Answer» SOLUTION :BINARY FISSION

Discussion

4448.	Question : Ameobiasis occurs in abundance in tropical regions because
Answer» tropics have large HOUSEFLY populations tropics have several species of mosquitoes in large numbers the temperature in SUMMER in the tropics ishigh many more species of birds OCCUR in tropics than in temperature regions Answer :A

Discussion

4449.	Question : Aluminium is used for making cooking utensils. Which of the following properties of aluminium responsible for the same i) Good thermal conductivity ii) Good electrical conductivity iii) Ductility iv) High melting point
Answer» (i) and(II) (i) and (III) (ii) and (iii) (i) and (IV) ANSWER :D

Discussion

4450.	Question : Although coal and petroleum are produced by degradation of biomass, yet we need to conserve them. Why?
Answer» Solution :(a) The coal and petroleum reserves can get exhausted, if we USE them at rapid rate. (b) The formation of the FOSSIL fuel is very slow process and takes very long time for renewal. (C) It is necessary to CONSERVE the resource, for the future GENERATION, by reducing their consumption.

Discussion

Explore topic-wise InterviewSolutions in .

Question : An organism, which is connecting link betwee nanimals and plants, is

Question : An organism which is a worm, has very simple 'eyes',thatare really eyes spots which detect light. Name theorganism.

Question : An organism having more than two sets of chromosomes is called polyploit aded by physical pents such as heat or cold treatment, -rays and chemical s like colchicine. Achievements of polyploidy breeding.

Question : An organ in earthworm analogous to our kidney

Question : An offpsing of two homozygous parents differing from one another by alleles at only one gene locus is :

Question : An object 2cm tall is kept on the principal axis of a converging lens of focal length 8 cm. Find the position, nature and size of the image formed if the object is at 12cm from the lens. Also find the magnification produced by the lens.

Question : An old man is advised by his doctor to take less sugar in his diet. Name the disease from which the man is suffering. Mention the hormone due to imbalance of which he is suffering from this disease. Which endocrine gland secretes this hormone ?

Question : An inexhaustible resources is.............

Question :An individual cannot pass on to its progeny theexperiences of its lifetime “ Justify the statement with the help of an example and also give reason for tthe same

Question : An illustration related to human evolution is given.Analyse it and answer the following questions: How does the comparative study of haemoglobin helped to idfentify the evolutionary relationship between man and chimpanzee?

Question : An illustration related to human evolution is given.Analyse it and answer the following questions: Write the names of categories (i) and (ii)

Question : An illustration related to human evolution is given.Analyse it and answer the following questions: Mention the two important characteristics of organisms belong to (ii).

Question :An example of homologous organs is ..............a.our arm and a dog's foreleg.b.our teeth and an elephant's tusks.c.potato and runners of grass.d.all of the above

Question : An example of homologous organs is

Question : An erythrocyte lives for approximately

Question : An enzyme which can only act in acidic me dium is

Question : An electric refrigerator rated 300 W is used for 8 hours a day. An electric iron box rated 750 Wis used for 2 hours a day. Calculate the cost of using these appliances for 30 days, if the cost of 1 kWh is Rs. 3/-

Question : An electric motor is taken out from a toy ear. How do you convert this motor into a small electric generator? Compare the function of electric generator with the phenomenon of electromagnetic induction.

Question : An electric geyser rated 1500W, 250 V is connected to a 250v line mains. Calculate the electric current drawn by it, energy consumed by it in 50 hours and energy consumed if each unit coast Rs. 6.00.

Question : An ecosystem resists change because it is in a state of

Question :An ecosystem includes

Question : An ecosystem has producers. herbivores and carnivores but without which of following it is not complete?a.Secondary carnivoresb.Higher carnivoresc.Omnivoresd.Decomposers

Question : An earthworm lacks

Question : An arthropod has all the following characteris tics except

Question : An aquatic plant with floating leaves

Question : An anticoagulant used for preventing clotting in vitro is sodium oxalate. It prevents clot formation by

Question : An animal with a diet deficient in at least one essential nutrient is said to be

Question : An ammeter is always connected in series acrose a ciruit element what happens when it is connected in parallel with a circuit element.

Question : An American plant that had become a trouble- some watcrweed in India is

Question : An alternating current has frequency of 50Hz. How many times it has changed its direction In one second.

Question : An allergic disease is,

Question : Amrita Devi had sacrificed her life for the protection of ......... trees.a.khejrib.banyanc.pipald.pandanas

Question : Amount of O_(2) normally carried by 100 ml of pure blood, is

Question : Amongst the following, which one is not a man made ecosystem :

Question : Amongst Planaria, Insect, Octopus, Invertebrates and Vertebrates, the evolution of which organ can be explained stepwise?a.Earsb.Wingsc.Eyesd.Feathers that develops

Question : Among the invertebrates, arthropods are unique in possessing

Question : Among the following, which plant is completely devoid of roots?

Question : Among the following which lone is recently discovered non-leguminous nitrogen-fixing bacterium

Question : Among the following, which have posed a threat to the environment ? Body spray. bacteria. aerosols. CFCs, wild grass.

Question : Among the following ecosystems which one has the maximum biomass?

Question : Among rust,smut and mushroom all the three

Question : Among pollutants that has the most lasting effect

Question : Among mammals, an herbivore has

Question : Amoebic dysentery is caused by

Question : Amoeba is alan

Question : Amoeba belongs to class

Question : Amoeba and Leishmania reproduce by______________ .

Question : Ameobiasis occurs in abundance in tropical regions because

Question : Aluminium is used for making cooking utensils. Which of the following properties of aluminium responsible for the same i) Good thermal conductivity ii) Good electrical conductivity iii) Ductility iv) High melting point

Question : Although coal and petroleum are produced by degradation of biomass, yet we need to conserve them. Why?