ISC BIOLOGY Class-12 Chapter 1. Reproduction in Organisms MCQ

ISC BIOLOGY

Class-12

Chapter 1. Reproduction in Organisms

MCQ

1. Choose the correct statement from amongst the following—

(a) Dioecious (hermaphrodite) organisms are found only in animals

(b) Dioecious organisms are found only in plants

(c) Dioecious organisms are found in both plants and animals

(d) Dioecious organisms are found only in vertebrates

2. There is no natural death in single celled organisms like Amoeba and Bacteria because—

(a) They cannot reproduce sexually

(b) They reproduce by binary fission

(c) Parental body is distributed among the offspring

(d) They are microscopic

3. There are various types of reproduction. The type of reproduction adopted by an organism depends upon—

(a) The habitat and morphology of the organism

(b) Morphology of the organism

(c) Morphology and physiology of the organism

(d) The organism’s habitat, physiology and genetic makeup

4. Identify the incorrect statement—

(a) In asexual reproduction, the offsprings produced are morphologically and genetically identical to the parent

(b) Zoospores are sexual reproductive structures

(c) In asexual reproduction, a single parent produces offspring with or without the formation of gametes

(d) Conidia are asexual structures in Penicillium

5. Which of the following is a post-fertilization event in flowering plants?

(a) Transfer of pollen grains

(b) Embryo development

(c) Formation of flower

(d) Formation of pollen grains

6. The number of chromosomes in the shoot tip cells of maize plant is 20. The number of chromosomes

in the microscopic mother cells of the same plant shall be—

(a) 20 (b) 10 (c) 40 (d) 15

7. Vegetative propagation in Pistia occurs by—

(a) Stolon (b) Offset (c) Runner (d) Sucker

8. Which one of the following processes result in the formation of clone of bacteria ?

(a) Transformation (b) Transduction

(c) Binary fission (d) Conjugation

9. Microsporangia is a technique—

(a) For the production of true to type plants

(b) For production of haploid plants

(c) For production of somatic hybrid

(d) For production of somaclonal plants

10. Example of Corm is—

(a) Ginger (b) Colocasia

(c) Onion (d) Potato

11. What is common between negative reproduction and apomixis ?

(a) Both are applicable to dicot plants only

(b) Both bypass the flowering phase

(c) Both occur round the year

(d) Both produces progeny identical to the parent

12. Which part would be most suitable for raising virus free plants for micropropagation ?

(a) Bark (b) Vascular tissue

(c) Meristem (d) None of these

13. Which one of the following is common to multicellular fungi, filamentous algae and protonema of mosses ?

(a) Diplontic life cycle

(b) Members of kingdom Plantae

(c) Mode of nutrition

(d) Multiplication by fragmentation

14. Banana is vegetatively propagated by—

(a) Tubers (b) Rhizomes (c) Bulbs (d) Suckers

15. A scion is grafted to stock. The quality of fruits produce will be determined by genotype of—

(a) Stock (b) Scion (c) Both stock and scion (d) Neither stock nor scion

16. Transverse binary fission occur in—

(a) Euglena (b) Amoeba (c) Hydra (d) Paramecium

17. In which of the following organism, self fertilization is seen ?

(a) Fish (b) Roundworm (c) Earthworm (d) Liver fluke

18. Which of the following animal is having longitudinal binary fission ?

(a) Euglena (b) Plasmodium (c) Planaria (d) Hydra

19. Spermatids are transformed into spermatozoa by—

(a) Spermiogenesis (b) Meiosis (c) Spermatosis (d) Spermiation

20. Which of the following is hermaphrodite ?

(a) Ant (b) Aphid (c) Earthworm (d) Cockroach

21. Study of pollen grains is called—

(a) Ethnology (b) Palynology (c) Paleobotany (d) Co-taxonomy

22. When seeds are attached to parent plant, the type of germination in known as—

(a) Ovipary (b) Epigeal (c) Vivipary (d) Hypogeal

23. Sexual reproduction in fungi may occur by means of —

(a) Sporangiospore, oospore and ascospore

(b) Zoospore, oospore and ascospore

(c) Sporangiospore, ascospore and basiodiospore

(d) Oospore, ascospore and basidiospore

24. External fertilization occurs in majority in —

(a) Algae (b) Fungi (c) Liverworts (d) Mosses

25. Vegetative propagation in Mint occurs by—

(a) Offset (b) Rhizome (c) Sucker (d) Runner

26. Which of the following statement support the view that elaborate sexual reproductive process

appeared much later in the organic evolution ?

(i) Lower group of organisms have simpler body design

(ii) Asexual reproduction is common in lower groups of organisms

(iii) Asexual reproduction is common in higher groups of organisms

(iv) The high incidence of sexual reproduction in angiosperms and vertebrates

Choose the correct answer from the options given below—

(a) (i) and (ii)

(b) (i) and (iii)

(c) (ii) and (iv)

(d) (ii) and (iii)

27. Offspring formed by sexual reproduction exhibit more variation than those formed by asexual

reproduction because :

(a) Sexual reproduction is a lengthy process

(b) Gametes of parents have quantitatively or qualitatively different genetic composition

(c) Genetic material comes from parents of two different species

(d) Greater amount of DNA is involved in sexual reproduction

Ans. 1. (c), 2. (c), 3. (d), 4. (b), 5. (b), 6. (a), 7. (b), 8. (c),

9. (a), 10. (b), 11. (d), 12. (c), 13. (d), 14. (b), 15. (b), 16. (d), 17. (d), 18. (a), 19. (a), 20. (c). 21. (b), 22. (c), 23. (d), 24. (a),

25. (c), 26. (c), 27. (b).