REPRODUCTION IN ORGANISMS-NEET PRACTICE QUESTIONS

 

                                 REPRODUCTION IN ORGANISMS

1. A potato tuber is sown in a pot and pot is placed in the freezer of refrigerator. New plants will:

A) Emerge normally

B) Not emerge

C) Be without leaves

D)Be without flowers

Correct Answer: B

2. Soil around stem of potato plant is constantly removed from very young stage so that only roots remain in the soil. Potato tubers in plant will be:

A) Larger          

B) Smaller

C) Formed normally

D) not formed

Correct Answer: D

3. Banana fruits are seedless, because:

A) Auxins are sprayed for rapid development of fruit.

B) Vegetative propagation of plant.

C) They are triploid plants.

D) Fruits are artificially ripened.

Correct Answer: C

4. Reproducing new plants by cells instead of seeds is known as:

A) Biofertiliser       

B) Mutation

C) Tissue culture     

D)  Antibiotics

Correct Answer: C

5. The formation of gametophyte from the sporophyte (without meiosis) is called:

A) Apospory   

B) Apogamy

C) Agamospermy   

D) None of these

Correct Answer: A

6. A small portion of cane-sugar stem between the two successive nodes is cut off and sown in the soil normally. New plants will be:

A) formed normally 

B) not formed

C) Without juice                 

D) without nodes

Correct Answer: B

7. Apomixis in plant means development of a plant:

A) From root cuttings.

B) Without fusion of gametes.

C) From cuttings of stem.

D) From fusion of gametes.

Correct Answer: B

8. After culturing the anther of a plant, a few diploid plants were found along with haploid plants. The diploid plants could have arisen from:

A) Generative cell of pollen

B) Cells of anther wall

C) Vegetative cell of pollen

D) Exine of pollen wall

Correct Answer: B

9. Carrot is micropropagated through:

A) Embryo          

B) Embryoids

C) Shoot culture     

D Callus

Correct Answer: D

10. Modified stem present in Gladiolus is:

A) Bulb           

B) Rhizome

C) Corm         

D) Bulbil

Correct Answer: C

11. Match column-I with column- II and select the correct answer using the codes given below.
Column-I(Name of the organism)Column-II(Haploid chromosome number in gamete)
A.Ophioglossum(fern)I.23
B.RiceII.24
C.PotatoIII.12
D.ManIV.630

A) A-I;     B-II;    C-III;    D-IV

B) A-II;    B-III;   C-IV;    D-I

C) A-III;    B-IV;   C-II;    D-I

D) A-IV;   B-III;   C-II;       D-I

Correct Answer: D

12. Which one of the following pair is correctly matched?

A) Onion - Bulb

B) Ginger - Sucker

C) Chlamydomonas - Conidia

D) Yeast - Zoospores

Correct Answer: A

13. Sweet potato is a modification of:

A) Stem                

B) Adventitious root

C) Hypocotyl        

D) Flowering axis

Correct Answer: B

14. In Onion, the edible swollen portion is:

A) Aerial stem        

B) Underground stem

C) Internodes                     

D) Leaf bases

Correct Answer: D

15. Which one of the following is a fruit?

A) Ginger           

B)Sweet potato

C) Radish           

D)Lady's finger

Correct Answer: D

16. Which of the following is cultivated through vegetative propagation?

A) Banana and Ginger

B) Potato and Sugarcane

C) Dahlia and Rose

D) All of the above

Correct Answer: D

 17. Rhizome reproduction is observed in:

A) Solarium tuberosum

B) Ginger

C) Achyranthes

D) All of the above

Correct Answer: B

18. Roses and banana are usually propagate through

A) Parthenocarpy    

B)Cutting

C) Grafting         

D)Layering

Correct Answer: B

19. .......................are thick walled spores produced by Rhizopus which are capable of withstanding unfavourable conditions?

A) Chlamydospores 

B) Zoospores

C) Oidia            

D)Sporangiospores

Correct Answer: A

20. Vegetative reproduction in Cycas occurs by:

A) Sporophyll       

B) Bulbils

C) Scaly leaves      

D)Fragmentation

Correct Answer: B

21. Artificial induction of roots on stems before it is separated from the parent plant for propagation is called:

A) Root-stem joint

B) Plant tissue culture

C) Grafting            

D) Layering

Correct Answer: D

22. Match the following columns and choose the correct option.
Column-IColumn-II
A.CloneI.Agamospermy
B.Plant apomixesII.Scion
C.GraftingIII.Callus
D.Tissue cultureIV.Flower
E.In florescenceV.Ramet

A) A-V;     B- I;    C-II;    D-III;    E-IV

B) A-IV;    B-I;     C-III;   D-II;     E-IV    

C) A-I;       B-II;    C-III;   D-IV;    E-V     

D) A-V;     B-II;    C-III;   D-IV;    E-I

Correct Answer: A

23. Which the following statements are correct?
(i) Stamens are male reproductive part whereas carpels are female reproductive parts.
(ii) In Spirogyra, asexual reproduction takes place by fragmentation.
(iii) Vegetative propagation by leaves occurs in sweet potato.

A) (i) and (ii)   

B) (ii) and (iii)

C) (i) and (iii)         

D) All of the above

Correct Answer: A

24. Identify the correct option that describes all the three diagrams correctly.
[a]   
[b]            [c]   

A) A-Male cockroach, B-Funaria, C-Unisexual flower

B) A-Male cockroach, B-Marchantia, C-Bisexual flower

C) A-Female cockroach, B-Cycas, C-Unisexual flower

D) A-Female cockroach, B-Marchantia, C-Bisexual flower

Correct Answer: B

25. Common mode of reproduction in Penicillium is:

A) Conidia

B)Gemmule formation

C) Buds                            

D) Zoospore

Correct Answer: A

26. For vegetative propagation, the vegetative part of the plant should have:

A) A growing point  

B)Reserved food

C) Leaf                 

D)Both [a] and [b]

Correct Answer: D

27.  In a grafted plant, stock has 48 chromosomes while scion has 24 chromosomes. The chromosome number for root cells and eggs are:

A) 48 and 24        

B) 24 and 24

C) 24 and 12        

D)48 and 12

Correct Answer: D

28. Which is the most common method of reproduction in majority of fungi and bacteria?

A) Binary fission    

B) Multiple fission

C) Budding         

D) Spore formation

Correct Answer: D

29. Which of the following definitions about oviparity is false?        

A) Only birds and reptiles are oviparous.

B) The large amount of yolk provides the nutrients for the developing embryo.

C) The shell protects the egg from dehydration.

D) Both oxygen and carbon dioxide can diffuse through the shell.

Correct Answer: A

30.  Ploidy of ovary, anther, egg, pollen, male gamete and zygote are respectively:

A) 2n, 2n, n, 2n, n, 2n

B) 2n, 2n, n, n, n, 2n

C) 2n, n, n, n, n, n 

D) 2n, 2n, n, 2n, 2n, 2n

Correct Answer: B



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