Test-MCQ Class 10-NCERT -Science-Chapter 8-Test-2 Chapter 8: How do Organisms Reproduce? Multiple Choice Questions No of Questions : 15 Marks: 15 Please enter your email: 1. Factors responsible for the rapid spread of bread mould on slices of bread are I. large number of spores. II. availability of moisture and nutrients in bread. III. presence of tubular branched hyphae. IV formation of round-shaped sporangia I and II II and IV III and IV I and III 2. During adolescence various changes occur in the body of humans. Mark one change associated with sexual maturation in males. Cracking of voice Weight gain Increase in body height Loss of milk teeth 3. Observe the diagram given along side. What happens after the above stage? Ovary develops into a fruit and ovules into seeds The ovary splits open Germination of seeds takes place The pvules are dispersed 4. What in your opinion could be the best reason to explain why menstruation is not taking place in a healthy woman? Build up of female sex hormones in the blood stream Early release of ovum Psychological reason Fertilisation of ovum 5. The correct sequence of reproductive stages seen in flowering plants is seedling, embryo, zygote, gametes gametes, embryo, zygote, seedling gametes, zygote, embryo, seedling zygote, gametes, embryo, seedling 6. Offsprings formed by asexual method of reproduction have greater similarity among themselves because I. asexual reproduction involves only one parent. II. asexual reproduction does not involve gametes. III. asexual reproduction occurs before sexual reproduction. IV. asexual reproduction occurs after sexual reproduction. III and IV II and IV I and III I and II 7. Two flowers are identified by a botanist with the following features that flower A is having only stamen and flower B is having both stamen and pistil. Which of the following statements is correct? Flower A cannot be fertilised and flower B can show fertilisation. Neither flower A and nor flower B can show self-pollination. Flower A will produce pollen grains and flower B cannot produce pollen grains. Flower A will bear seeds and flower B cannot bear seeds after fertilisation. 8. In the list of organisms given below, those that reproduce by the asexual method are (i) banana (ii) dog (iii) yeast (iv) Amoeba (i) and (iv) (i), (iii) and (iv) (ii), (iii) and (iv) (ii) and (iv) 9. In a flower, the parts that produce male and female gametes (germ cells) are anther and ovary filament and stigma stamen and style stamen and anther 10. Which of the following is the correct sequence of events of sexual reproduction in a flower? pollination, fertilisation, seedling, embryo embryo, seedling, pollination, fertilisation seedling, embryo, fertilisation, pollination pollination, fertilisation, embryo, seedling 11. Characters transmitted from parents to offspring are present in genes golgi bodies cytoplasm ribosome 12. In Spirogyra, asexual reproduction takes place by breaking up of filaments into smaller bits formation of young cells from older cells. division of a cell into many cells division of a cell into two cells 13. The number of chromosomes in parents and offsprings of a particular species remains constant due to halving of chromosomes during gamete formation halving of chromosomes after gamete formation doubling of chromosomes after gamete formation doubling of chromosomes after zygote formation 14. In Rhizopus, tubular thread-like structures bearing sporangia at their tips are called. filaments roots hyphae rhizoids 15. Vegetative propagation refers to formation of new plants from stem, flowers and fruits stem, leaves and flowers stem, roots and leaves stem, roots and flowers Please Enter Your Name, School Name & Class in the given below box and submit: ( results will be shown after submit, within few moments on same page ) Loading … Question 1 of 16
