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 I and III II and IV III and IV 2. During adolescence various changes occur in the body of humans. Mark one change associated with sexual maturation in males. Loss of milk teeth Increase in body height Weight gain Cracking of voice 3. Observe the diagram given along side. What happens after the above stage? The ovary splits open Ovary develops into a fruit and ovules into seeds The pvules are dispersed Germination of seeds takes place 4. What in your opinion could be the best reason to explain why menstruation is not taking place in a healthy woman? Early release of ovum Psychological reason Fertilisation of ovum Build up of female sex hormones in the blood stream 5. The correct sequence of reproductive stages seen in flowering plants is zygote, gametes, embryo, seedling gametes, zygote, embryo, seedling gametes, embryo, zygote, seedling seedling, embryo, zygote, gametes 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 I and III I and II II and IV 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? 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. Flower A cannot be fertilised and flower B can show 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 (ii), (iii) and (iv) (i) and (iv) (ii) and (iv) (i), (iii) and (iv) 9. In a flower, the parts that produce male and female gametes (germ cells) are anther and ovary stamen and style stamen and anther filament and stigma 10. Which of the following is the correct sequence of events of sexual reproduction in a flower? embryo, seedling, pollination, fertilisation seedling, embryo, fertilisation, pollination pollination, fertilisation, seedling, embryo pollination, fertilisation, embryo, seedling 11. Characters transmitted from parents to offspring are present in golgi bodies cytoplasm ribosome genes 12. In Spirogyra, asexual reproduction takes place by division of a cell into many cells division of a cell into two cells breaking up of filaments into smaller bits formation of young cells from older cells. 13. The number of chromosomes in parents and offsprings of a particular species remains constant due to halving of chromosomes after gamete formation halving of chromosomes during 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. hyphae filaments rhizoids roots 15. Vegetative propagation refers to formation of new plants from stem, roots and flowers stem, leaves and flowers stem, roots and leaves stem, flowers and fruits 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
