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. 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 (iv) (i) and (iii) (ii) and (iv) (ii) and (iii) None 2. 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) T (i) T (ii) T (iii) T (iv) F (i) F (ii) T (iii) T (iv) F (i) F (ii) F (iii) T (iv) F None 3. The body breaks up into several fragments and each fragment starts to live as a new individual. This type of asexual reproduction is called: Fragmentation Binary fission Budding Regeneration None 4. 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? Creating a mechanical barrier Sterilization method Taking oral pills Using Copper-T None 5. 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. Both population A and population B are stable. Stability cannot be determined from the presence or absence of variations None 6. What could be the reasons for adopting contraceptive methods? To maintain the distance between two children and to plan the family size. All of the above To prevent sexually transmitted diseases. To maintain the population size by preventing unwanted pregnancies. None 7. Name the process in which thousands of plants can be raised within a limited time and space. Self pollination Tissue culture Water Pathernocarpy None 8. 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 - iii, 3 - iv, 4 - i 1 - ii, 2 - i, 3 - iv, 4 - iii 1 - iii, 2 - iv, 3 - i, 4 - ii 1 - iv, 2 - iii, 3 - ii, 4 - i None 9. Which one of the following methods requires two genetically variable individuals to produce the progeny? Cutting Layering Goatee Budding None 10. In which process is the number of chromosomes is reduced to half? Budding Mitosis Fragmentation Meiosis None 11. Pollination refers to the: Transfer of female gametes from anther to stigma. Transfer of pollen from anther to stigma. Transfer of pollen from anther to ovary. Transfer of pollen from anther to ovule. None 12. Which one of the following is not associated with reproduction? Chick hatching from an egg. A dog giving birth to puppy. A new leaf coming out of a tree branch. A seed growing into a plant. None 13. Although organisms die, their kind continues to live on Earth. Which characteristic of living organisms makes this possible? Respiration Excretion Movement Reproduction None 14. 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 I All of the above All except IV All except III None 15. 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 Statement 1is incorrect but statement 2 is correct Both statement 1 and 2 are correct None 16. A narrow waistline, wide hip and oily skin are the secondary signs of puberty in: Males Not gender-based Both A and B Females None 17. Which of the following is a post fertilization event in flowering plants? Formation of flower Embryo development Transfer of pollen grains Formation of pollen grains None 18. 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 Development of mammary glands, 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. 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, acne and pimples on the face, development of sex organs, growth of pubic hair. None 19. What is the purpose of combining variations from two or more individuals by sexual reproduction? To create new combinations of variants. To make DNA copying mechanism accurate. To ensure no variants are created. To decrease the chances of survival. None 20. The mode of reproduction that depends on the involvement of two individuals to create a new generation is called: Budding None of the above Sexual reproduction Asexual reproduction None Time's up Please Share This Share this content Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Leave a Reply Cancel replyCommentEnter your name or username to commentEnter your email address to commentEnter your website URL (optional) Save my name, email, and website in this browser for the next time I comment.
