InterviewSolution
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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A women uses a device X made of a common metal for preventing pregnancy. This device works by preventing the implantation of fertilised egg cell (or embryo) in the female organ Y. (a) What are the two names of device X ? (b) Name the organ Y. (c ) Can this method of contraception protect a women from acquiring a STD? |
| Answer» Correct Answer - (a) Copper-T and IUCD (b) Uterus (or Womb) (c) No | |
| 2. |
In the surgical method of birth control available for males, the structures A in the reproductive system are cur and ligated (tied up) at both ends. This prevents the reproductive cells B from coming out from the organs C where they are made in the male body. Since B connot come out from the male body, they connot fuse with cell D in the body of a female and hence pragnancy is prevented. (a) What are structures A ? (b) What are cells B ? (c ) Name the organs C. (d) What is cell D ? (e) What is the name of this surgical procedure for birth control available to males ? |
| Answer» Correct Answer - (a) Sperm ducts (or Vas deferens ) (b) Sperm (c) Testes (d) Egg cell (or Ovum) (e) Vesectomy | |
| 3. |
People who die from AIDS are not killed by the virus itself. Explain. |
| Answer» Correct Answer - (a) Placenta (b ) About nin months (c) Cervix | |
| 4. |
What are the causative organism for the following diseases ? (i) Gonorrhoea (ii) Syphilis (iii) AIDS |
| Answer» Correct Answer - (i) Bacteria (ii) Bacteria (iii) Virus | |
| 5. |
The male gametes in a flower and in a human are produced sperm in:A. stigma and ovaryB. anther and styleC. ovary and testesD. radicle |
| Answer» Correct Answer - D | |
| 6. |
When an insect sits on the flower of a plant them some particles A present in the top of little stalks in the flower attach to its body hair. When this insect now sits on the flower of another similar plant, then particles A attached to the hair of insect are put on the top of a flask-shaped organ at the centre of flower. The particle A grows a long tube B from the top of flask-shaped organ through which C moves down and reaches the bottom part of flask-shaped organ. Here C fuses with the nucleus of D contained in structure E. the fusion of C and D forms a new cell F wich grows and develops into a seed of the plant.? (a) What are particles A ? What is the process of transferring A from one flower to another flower of similar plant by the insect of known as? (b) What is the name of tube B? (c) What is C which moves down through the tube B? ltbr? (d)Name D and E. (e) What is F? |
| Answer» Correct Answer - (a) A are pollen grains ; Cross pollination (b) F is fertilised egg (zygote) | |
| 7. |
The flask-shaped organ A at the centre of a flower is surrounded by a number of little stalks B having swollne tops which lie just inside the ring of petals. (a) Name A. What are the various parts of A ? (b) Which part of A contains gametes ? (c) Name B. What is the swollen top of B known as ? (d) What does the swollen top pf B contain ? (e) Out of A and B, which one is (i) male part, and (ii) female part of the flower ? |
| Answer» Correct Answer - (a) A is carpel (or pistil) ; Stigma, Style and Ovary (b) Ovary (c) B is stamen ; Anther (d) Pollen grains (e) (i) B (ii) A | |
| 8. |
When the branches of a plant growing in the field are pulled towards the ground and a part of them is convered with moist soil (leaving the tips of the branches exposed above the ground), then after some time new roots develop from the parts of branches buried in ths soil. On cutting these branches from the parent plant new plants are produced from the cut parts of branches which had developed roots. (a) What is this method or propagation of plants knows as ? (b) What type of branches should a plant have to be able to be propagated by this method? (c) Name any two plants which are grown for thier fruits and propagated by this method (d) Name any two plants which are grown for thier fruits and propagated by this method (e) Name of plant which gets propagated by this method naturally by forming runners (soft horizontal stem running above the ground) |
| Answer» Correct Answer - (a) Layering (b) Slender branches (Thin branches) (c) Jasmine and china rose (d) Lemon and Guava (e) Strawberry | |
| 9. |
A scientist removed some cells from the growing point of a plant and placed it in a suitable medium leading to the formation of a shapeless lump of mass X,Y is then transferred to another medium which stimulates it to develop roots. Whem X which developed roots is placed in a yet aniother medium, then it develops shoots to from tiny plantlets. These plantlets can then be transplanted in pots or soil where they can grow to form mature plants. (a) What is the shapeless lump of mass X known as ? (b) What name is given to this method of producing new plants ? (c) The growth medium used in this method contains palnt nutrients in the form of jelly . Name this jelly. (d) What is the general name of chemicals used to stimulate the growth of palnt cells and development of roots and shoots? (e) Name any two plants which are produced by this method. (f) State any two advantage of this method of producing plants (g) What is the other name of thsi method [other than that given in (b) above ? |
| Answer» Correct Answer - (a) Callus (b) Tissues culture (c) Agar (d) Plant hormones (e) Dahlia and Caration (f) See page 139 (g) Micropropagation | |
| 10. |
(a) What is a tuber? Name one stema tuber and one root tuber. (b) What is name of organ of propagation present in a tuber ? (c) Name one commonly used vegetable which is propagated by using tubers. |
| Answer» Correct Answer - (a) Stem tuber : Potato; Root tuber : Seet potato (b) Buds (or Eyes) (c) Potatoes | |
| 11. |
Reproduction is essential for living organisms to order toA. Keep the individual organ aliveB. fulfil their energy requirementsC. maintain growthD. continue the species for ever |
| Answer» Correct Answer - D | |
| 12. |
How are the modes for reproduction different in unicellular and multicellular organisms? |
| Answer» In unicellular organisms, reproduction occurs by the division of the entire cell. The medes of reproduction in unicellular organisms can be fission, budding, etc. whereas in muiticellular organisms, specialised reproductive organs are present Therefore, they can reproduce by complex reproductive methods such as vegetative propagation, spore formation, etc In more complex multicellular organisms such as human beings and plants, the mode of reproduction is sexual reproduction | |
| 13. |
How does reproduction help in providing stability to population of species? |
| Answer» Reproduction is the process of producing new individuals of the same species by existing or anisms of a species, so, it helps in providing stability to population of species by giving birth to new individuals as the rate of birth must be at par with the rate of death to provide stability to population of a species | |
| 14. |
Match the organisms given in column I with the method of reproduction / propagation given in column II :`{:(,"Column I", ,"Column II"),((i),"Plasmodium",(a), "Spore formation"),((iv),"Spirogyra",(b),"Leaves"),((ii),"Jasmine",(c),"Regeneration"),((iv),"Apple tree",(d),"Budding"),((v),"Bryophyllum",(e),"Binary fission"),((vi),"Potatoes",(f),"Layeri ng"),((vii),"Rhizopus",(g), "Fragmentation"),((viii),"Hydra",(h),"Tubers"),((ix),"Planaria",(i),"Cuttings"),((x),"Leishmania",(j),"Multile fission"),((xi),"Sugar cane",(k),"Grafting"),((xii),"Rose",,):}` |
| Answer» Correct Answer - (i) j (ii) g (iii) f (iv) (k) (v) b (vi) h (vii) a (viii) d (ix) c (x) e (xi) `i` (xii) `i` | |
| 15. |
What could be the reasons for adopting contraceptive methods? |
|
Answer» Contraceptive methods are mainly adopted because of the following reasons: To prevent unwanted pregnancies. To control population rise or birth rate. To prevent the transfer of sexually transmitted diseases |
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| 16. |
(a) What substances are contained (i) in oral pills, and (ii) in vaginal pills, used as contraceptives ? How do they work ? (b) How does copper-T prevent pregnancy ? (c) Name the disease caused by HIV. |
| Answer» Correct Answer - AIDS | |
| 17. |
Two very small organisms X and Y both reproduce by the method of budding. Organism X is industrially very important because it is used in making alcohol from suger. It is also used in making bread. Organism Y lives in freshwater. If organism Y gets cut into a number of parts accidently , each cut part can grow to from complete organism. (a) What are oganisms X and Y ? (b) What is the name of proces in which X convert sugar into alcoholgt (c) To Which class of organisms does X belong? (d) Name an important body feature of organism Y (e) Which organism is multicellular and which one is unicellular? |
| Answer» Correct Answer - (a) is X yeast and Y is Hydra (b) Fermentation (c) Fungi (d) Y has tentacles (e) Y is multicellular wherease X is unicellular | |
| 18. |
One of the following organisms does not reproduce by binary fission. This is :A. AmoebaB. PlasmodiumC. LeishmaniaD. Paamecium |
| Answer» Correct Answer - B | |
| 19. |
State wheter the following statement is true of false : Spors prouduced by the bread mould plant are actually its seeds. |
| Answer» Correct Answer - False | |
| 20. |
Which type of reproduction : (a) involves gametes? (b) does not involve gametes? |
| Answer» Correct Answer - (a) Sexual reproduction (b) Asexual reprodcution | |
| 21. |
(a) Name two animals which reproduce sexually. (b) Name two animals which reproduce asexually. |
| Answer» Correct Answer - (a) Dogs and Cows (b) Amoeba and Hydra | |
| 22. |
Why are budding, fragmentation and regeneration, all considered to be asexual type of reproduction? |
| Answer» Correct Answer - Because in all these methods of reproduction, new organisms (offsprings ) are obtained from a single parent without the use of sex cells or gametes | |
| 23. |
The organisms which can reproduce by fragmentation are :A. Corals and SpongesB. Corals and SpirogyraC. Sea anemone and SpirogyraD. Sponges and Sea anemones |
| Answer» Correct Answer - C | |
| 24. |
Name the method by which Paramecium reproduces. Is this method sexual or asexual? |
| Answer» Correct Answer - Binary fission ; Asexual method | |
| 25. |
State wheter human beings reproduce by sexaul method or asexual method |
| Answer» Correct Answer - Sexual method | |
| 26. |
(a) What is the basic difference between asexual reproduction and sexaul reproduction ? (b) Which of the following organisms reproduce by sexual method and which by asexual method ? Amoeba, Cats, Humans, Hydra, Birds |
| Answer» Correct Answer - (b) Sexual method : Cats, Humans, Birds; Asexual method : Amoeba, Hydra | |
| 27. |
In the list of organisms given , those which reproduce by the asexual method are: (i) banana (ii) yak (iii) yeast (iv) AmoebaA. (ii) and ((iv)B. (i),(iii) and (iv)C. (i) and (iv)D. (ii),(iii) and (iv) |
| Answer» Correct Answer - B | |
| 28. |
(a) What is the difference between the two asexual methods of reproduction : fission and fragmentation. ? ltbr (b) Name one organism which reproduce by fission another which reproduces by fragmentatio. (c) What is meant by multiple fission ? Name onr organism which reproduces by the process of multiple fission. (d) Describe the processs of reproduction in Hydaa with the help of labelled diagrams. What is the name of this process of reproducton. ? (e) Name one unicellular organism which reproduces by the same asexual process as Hydra. |
| Answer» Correct Answer - By fission : Amoeba ; By fragmentation : Spirogyra (c) Plasmodium (d) Budding (e) Yeast | |
| 29. |
(a) Name the method by which bread mould (Rhizopus fungus) reproduces. Is this method sexaul or asexual? (b) What is yeast? Describe the process of reproduction in yeast with the help of labelled diagrams. (c) Name or tiny fresh-water animal which reproduces by the same method as that of yeast? What is this method known as ? (d) Name two marine organisms which also reproduce by the same method yeast but from colonies. |
| Answer» Correct Answer - (a) Spore formation ; Asexual method (c) Hydra ; Budding (d) Sponges and Corals | |
| 30. |
A feature of reproduction that is cammon to Amoeba, Yeast and Bacterium is that :A. they are all multicellularB. they are all unicellularC. they reproduce only sexuallyD. they reproduces asexually |
| Answer» Correct Answer - D | |
| 31. |
The method of asexual reproduction in plants in which callus is produces is :A. micropropagationB. vegetative propagationC. regenerationD. fragmentation |
| Answer» Correct Answer - A | |
| 32. |
A multicellular which reproduces by budding is :A. AmocbaB. YeastC. LeishmaniaD. Hydra |
| Answer» Correct Answer - D | |
| 33. |
The offsprings formed by asexual reproduction method have greater similarity among themselves because : (i) asexual reproduction involves only one parent (ii) asexual reproduction involves two parents (iii) asexual reproduction involves gametes (iv) asexual reproduction involves does not involve gametesA. (i) and (ii)B. (i) and (iii)C. (ii) and (iv)D. (i) and (iv) |
| Answer» Correct Answer - D | |
| 34. |
An organism which can by two asexual reproduction methods one similar to the reproduction in yeast ladn the other similar to the reproduction in Planaria is :A. SprogyraB. BryophyllumC. HydraD. Sea anemone |
| Answer» Correct Answer - C | |
| 35. |
Stock and scion are involved in the artificial method known as :A. tissue cultureB. layeringC. graftingD. cuttings |
| Answer» Correct Answer - C | |
| 36. |
One of the following occurs in the reproductive system of flowering plants as well as that of humans. This is :A. vas deferensB. antherC. ovaryD. style |
| Answer» Correct Answer - C | |
| 37. |
Which part of the human body : (a) produces sperms ? (b) produces ova? (c) passes sperms from a man to a woman ? |
| Answer» Correct Answer - (a) Testes (b) Ovaries (c) Penis | |
| 38. |
A worm X found in freshwater and slow -moving streams has been accidently cut into three pieces. It was observed that in due course of time, each cut piece of the worm develops to become a complete worm by growing all the missing parts. (a) Name the worm X which can exhibit this phenomenon of making complete worm from its cut body parts. (b) Name another organism Y which possesses the same characteristic of growing full its cut body parts. (c) What is the name of this process in which a complete organism is formed from its cut body part. (d) State wheter X and Y are unicellula and / or multicellular organisms . (e) Can a dog be produced completely from its cut body part (say, a cut tail) just like organisms X and Y? Why? |
| Answer» Correct Answer - (a) Planaria (Flatworm ) (b) Hydra (c) Regeneration (d) Simple multicellular organisms (e) No; Because dog is a complex multicellular organism | |
| 39. |
(a) Explain the term self pollination and cross-pollination ? (b) How do the insects help in cross- pollination ? (c) How is the process of pollination different from fertilization ? |
| Answer» Correct Answer - (c) In pollination, the pollens (containing male gametes ) are transferred from anther to stigma of carpel ; In fertilised, the male gamete fuses with the female gamete present in ovule inside the ovary of flower to form a fertilised egg or zygote | |
| 40. |
A Planaria worm is cut horizontally in he middle into two halves P and Q such that the part P contains the whole head of the worm. Another Planria worm is cut vertically into two halves R and S in such a way that both th cut pieces R and S contain half hed each. Which of the cut pieces of the two Planaria worms could regenerate to from the complete respective worms ?A. onlyB. only R and SC. P,R and SD. P,Q,R and S |
| Answer» Correct Answer - D | |
| 41. |
What are the importance of DNA copying in reproduction |
| Answer» DNA is the genetic material present in the cells of all organisms. The genetic information from generation to generation is carried by DNA It is therefore possible for the organism to produce organism of its own type due to DNA copying only.For the inheritance of traits of the parent,DNA copying is a must.DNA copying also brings about variation ,which forms the basis for the origin of new species | |
| 42. |
The cut part of stem (without roots) which is used in the process of grarfting is known as :A. stockB. stumpC. scionD. graft |
| Answer» Correct Answer - C | |
| 43. |
The cut part of stem (having roots and fixed to ground ) which is used in the process of grafting is known as :A. stockB. scionC. cuttingD. bud |
| Answer» Correct Answer - A | |
| 44. |
The germ cell A produced by a person X is round in shape and it fuses with another germ cell B having a long tail and produced by a person Y. The fusion of A and B produces a new cell C. The cell C divides repeatedly and grows inside the organ D of person X to form E in which the body features of the unborn baby are not much developed. E grows further to form F in which the various body features of the unborn baby (like hands, legs, eyes, and ears, etc.) can be identified. F grows further and ultimately forms a baby. What are A,B C,D E and F? Out of the two person X and Y, which one is male and which one female? |
| Answer» Correct Answer - A is ovum (or egg cell) ; B is sperm ; C zyote (fertilised egg) ;D is uteus ; E is embryo ; F is foetus ; Y is male; X is female | |
| 45. |
The normal body cell of an organism contains 28 pairs of chromosomes. The number of chromosomes present in its germ cell will be :A. 28B. 14C. 56D. 42 |
| Answer» Correct Answer - A | |
| 46. |
The number of chromosomes in parents and offsprings of a particular species remains constant. due toA. doubling og chromosomes after zygote formationB. halving of chromosomes during gamete formationC. doubling of chromosomes after gamete formationD. halving of chromosomes after gamete formation |
| Answer» Correct Answer - B | |
| 47. |
Characters transmitted from parents to offspring are present inA. cytoplasmB. ribosomeC. golgi bodiesD. genes |
| Answer» Correct Answer - D | |
| 48. |
The anther contains :A. sepalsB. ovulesC. carpelD. pollen grains |
| Answer» Correct Answer - D | |
| 49. |
Which of the following is not a sexually transmitted disease ?A. gonorrhoeaB. encephalitisC. syphilisD. AIDS |
| Answer» Correct Answer - B | |
| 50. |
The sexually transmitted disease which is caused by bacteria is :A. malariaB. diarrhoeaC. gonorrhoeaD. AIDS |
| Answer» Correct Answer - C | |