Ncert – class 10- science – Chapter 7 – How Do Organisms Reproduce 2 Welcome to your Ncert - class 10- science - Chapter 7 – How Do Organisms Reproduce 2 1. The body breaks up into several fragments and each fragment starts to live as a new individual. This type of asexual reproduction is called: Budding Fragmentation Binary fission Regeneration None 2. What could be the reasons for adopting contraceptive methods? All of the above To maintain the distance between two children and to plan the family size. To maintain the population size by preventing unwanted pregnancies. To prevent sexually transmitted diseases. None 3. During adolescence, the body of boys and girls undergoes certain changes. Given below are a few of those changes. Find which changes occur in boys:(a) Broad shoulders(b) Wider chests(c) Broadening of the hip region(d) Development of muscles(e) Development of mammary glands(f) Growth of facial hair(g) Acne and pimples on the face(h) Development of sex organs(i) High-pitched voice(j) Growth of pubic hair Broadening of the hip region, broad shoulders, wider chests, development of muscles, growth of facial hair, acne and pimples on the face, development of sex organs, growth of pubic hair. Broad shoulders, wider chests, development of muscles, growth of facial hair, acne and pimples on face, development of sex organs, growth of pubic hair. Broadening of the hip region, broad shoulders, wider chests, development of muscles, growth of facial hair. Development of mammary glands, acne and pimples on face, development of sex organs, growth of pubic hair. None 4. Which of the following statements are true for flowers?(i) Flowers are always bisexual.(ii) They are the sexual reproductive organs.(iii) They are produced in all groups of plants.(iv) After fertilization they give rise to fruits. (i) and (iii) (ii) and (iii) (ii) and (iv) (i) and (iv) None 5. Although organisms die, their kind continues to live on Earth. Which characteristic of living organisms makes this possible? Excretion Respiration Movement Reproduction None 6. Which of the following is a post fertilization event in flowering plants? Transfer of pollen grains Formation of pollen grains Embryo development Formation of flower None 7. Consider the following statements and select the option which correctly identifies true (T) and false (F) ones.(i) Ovary ripens to form seed and ovule ripens to form fruit after fertilization.(ii) Seed dispersed through water usually develop floating ability in the form of spongy or fibrous outer coat as in coconut.(iii) Pollination occurs before fertilization.(iv) Cutting, layering, grafting and tissue culture are the natural methods of vegetative propagation . (i) F (ii) T (iii) T (iv) F (i) T (ii) T (iii) T (iv) F (i) F (ii) T (iii) T (iv) T (i) F (ii) F (iii) T (iv) F None 8. Which one of the following is not associated with reproduction? A seed growing into a plant. Chick hatching from an egg. A new leaf coming out of a tree branch. A dog giving birth to puppy. None 9. Organisms in population A, have no genetic variations, and organisms of population B, have genetic variations. Based on this information, choose the correct statement. Population B is more stable than population A. Population A is more stable than population B. Stability cannot be determined from the presence or absence of variations Both population A and population B are stable. None 10. Statement 1 : Unisexual flowers are either staminate flowers or pistillate flowers.Statement 2 : Both monoecious and dioecious plants have unisexual flowers. Both statement 1 and 2 are incorrect Statement 1 is correct but statement 2 is incorrect Both statement 1 and 2 are correct Statement 1is incorrect but statement 2 is correct None 11. Match the pairs of types of asexual reproduction. Section-ASection-B(1) Fission(i) Spirogyra(2) Fragmentation(ii) Paramecium(3) Regeneration(iii) Mucor(4) Spore formation(iv) Planaria 1 - ii, 2 - i, 3 - iv, 4 - iii 1 - ii, 2 - iii, 3 - iv, 4 - i 1 - iii, 2 - iv, 3 - i, 4 - ii 1 - iv, 2 - iii, 3 - ii, 4 - i None 12. Name the process in which thousands of plants can be raised within a limited time and space. Water Tissue culture Pathernocarpy Self pollination None 13. The mode of reproduction that depends on the involvement of two individuals to create a new generation is called: None of the above Sexual reproduction Asexual reproduction Budding None 14. Which one of the following methods requires two genetically variable individuals to produce the progeny? Budding Goatee Layering Cutting None 15. Which of the following methods of preventing pregnancy, act by changing hormonal balance of the body so that eggs are not released and fertilization cannot occur? Using Copper-T Taking oral pills Sterilization method Creating a mechanical barrier None 16. In which process is the number of chromosomes is reduced to half? Meiosis Fragmentation Budding Mitosis None 17. Choose the correct statements about reproduction.a) Reproduction produces progeny with more or less similar features to the parents.b) Reproduction occurs by involving one parent (asexual) or two parents (sexual).c) Budding and fragmentation are the types of asexual reproduction. d) Reproduction is not observed in non-living organisms. All except III All except IV All except I All of the above None 18. What is the purpose of combining variations from two or more individuals by sexual reproduction? To create new combinations of variants. To ensure no variants are created. To decrease the chances of survival. To make DNA copying mechanism accurate. None 19. A narrow waistline, wide hip and oily skin are the secondary signs of puberty in: Both A and B Not gender-based Males Females None 20. Pollination refers to the: Transfer of pollen from anther to stigma. Transfer of female gametes from anther to stigma. Transfer of pollen from anther to ovule. Transfer of pollen from anther to ovary. 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