It has a knob like structure which is involved in reproduction called sporangia, containing spores, that develop into new Rhizopus. (a) The role of seminal vesicles and the prostate gland are as follows: Flower Structure and Reproduction Worksheet Answers Key. AIDS is transmitted by sexual contact with an infected person. Question.10 Illustrate the following with the help of suitable diagrams: Solution: The … The sex chromosome of human male is XY. (iv) AIDS (Acquired Immune Deficiency Syndrome). (c) Two advantages for organisms to reproduce themselves through spores are as follows: by existing organisms of a species, i.e. (c) Zygote is formed when male gamete, Le. (b) What is regeneration in organism? The development of the child inside the mother’s body takes approximately nine months. (ii) They secrete the hormone testosterone which regulates the formation of sperms and brings changes in appearance of boys at the time of puberty. Describe regeneration in Planaria with the help of a suitable diagram. Answer. sperm fuses with female gamete, i.e. […] Question.5 What is ‘reproduction’? Answer. (ii) Hormonal Imbalance Method: In SURVEY . All Chapter 2 - Sexual Reproduction in Flowering Plants Exercises Questions with Solutions to help you to revise complete Syllabus and boost your score more in examinations. Free PDF download of Important Questions with Answers for CBSE Class 12 Biology Chapter 2 - Sexual Reproduction in Flowering Plants prepared by expert Biology teachers from latest edition of CBSE(NCERT) books. The portion of a plant that is grafted on the other plant is called scion, and the plant in which grafting is performed is called the stock. NCERT Solutions Class 7 Science Chapter 12 Reproduction In Plants. (iii) Trichomoniasis Question.14 Mention the mode of reproduction used by REVIEW QUESTIONS The importance of DNA copying in reproduction are as follows: Plants raised by vegetative propa-gation can bear fruits and flowers earlier. (ii) Budding in Hydra. (ii) Syphilis Download a PDF of free latest Sample questions with solutions for Class 10, Biology, CBSE- How do organisms reproduce . The scrotum provides optimal temperature for the formation of sperms. Answer. (a) The part which contains pollen grains. (i) Binary Fission in Amoeba. … SHORT ANSWER TYPE QUESTK)NS[II] [3 Marks] – Year 2008. Answer. In the world of science, we study both plant and animal life cycle. 10 Lines on My Classroom for Students and Children in English. It is also true that not all flowers are colorful.In that case , flowers usually use the wind […] For example, a bacteria that can withstand heat will survive better in a heat wave, i.e. 1) Stigma (Top part,receive pollen grains from anther,sticky) 2) Style (Middle part,it is tube which connect stigma to ovary) 3) Ovary (Swollen part at the bottom,it makes ovules and store them,contain female gametes). it will not help in protecting her from sexually transmitted diseases. Answer. Thus, the surviving cells are similar but slightly different from each other. Use of condom for penis or for vagina as a mechanical barrier for the sperms to reach the egg. Sexual Reproduction in Flowering Plants ( All ) Select Topic. Plant Reproduction. Artificial methods of vegetative propagation like cutting are used to grow rose plants. With a neat diagram, explain the 7-celled, 8 nucleate nature of female gametophyte. The four sexually transmitted diseases are: development of human embryo. List any four methods of prevention (control) of AIDS. Types of Flowers • Bisexual flower: Both male and female reproductive parts are present. Answer. (i) before release of a fertilised egg? The DNA in the cell nucleus is the information source of making proteins. List two changes observed in girls at the time of puberty. You can also get complete NCERT solutions and Sample papers. Grafting: In this method of reproduction, two plants of closely related varieties are joined together so that they live as one plant. vas deferens: The sperms are carried by a long tube called vas deferens to organs called seminal vesicles where the sperms get nourishment and stored. This makes transportation of sperms easier and also provides nutrition to the sperms. They are caused by various microorganisms that live in warm and moist environments of the vagina, urethra, anus and mouth. Multiple Choice Questions with Answers to know their preparation level. Four modes of asexual reproduction are—Binary fission in Amoeba, Fragmentation in Spirogyra, Regeneration in Planaria and Budding in Hydra. The process of two fusions occurring in the embryo sac is called double fertilisation. Question.26 List any three differences between pollination and fertilisation. Conditions favourable for spore formation are: Question 1 . Question.33 What does HIV stand for? (ii) Offsprings produced are identical. (b) List two functions performed by testis in human beings. The most effective contraceptive which prevents the spread of these diseases is by the use of mechanical barriers such as physical devices like condoms. Answer.DNA copying is an essential part of the process of reproduction because: SHORT ANSWER TYPE QUESTIONS [I] [2 Marks] – Year 2009. Register online for Biology tuition on Vedantu.com to score more marks in your examination. to reproduce themselves through spores. Free PDF Download of CBSE Biology Multiple Choice Questions for Class 12 with Answers Chapter 2 Sexual Reproduction in Flowering Plants. (b) The average duration of human pregnancy is 40 weeks or 280 days. Question.42 How does growing embryo get nutrition from the mother’s blood? Bisexual flowers 2. DNA copies generated will be similar, but may not be identical to the original as some variations are so drastic that new DNA copy cannot work with the cellular apparatus it inherits. The ova is round in structure. Hydra reproduces by budding using the regenerative cells. Natural vegetative propagation by leaves: The fleshy leaves of Bryophyllum bear adventitious buds in the notches along the leaf margin. In this case, if the vas deferens in male is blocked, sperm transfer will be prevented and if the fallopian tube in the female is blocked, the egg will not be able to reach the uterus, thus fertilisation will not take place. (iii) Implantation of zygote. Question.6 “Variations that confer an advantage to (i) Fertilisation is defined as the fusion of a male gamete (sperm) with a female gamete (an ovum or egg) to form a zygote during sexual reproduction. Answer. Question.37 (a) What is fragmentation in organism? Question.25 Explain vegetative propagation with the help of two examples. Answer. Free PDF Download of CBSE Class 10 Science Chapter 8 How do Organisms Reproduce? What happens to human egg when it is not fertilised? DNA plays an important role in the reproduction of a cell. Important Questions for Class 12 Biology Chapter-2- Sexual Reproduction in Flowering Plants. If the egg is not fertilised, the thick and nourishing lining of the uterus breaks and comes out through vagina as blood and mucous. SHORT ANSWER TYPE QUESTIONS [2 Marks] – Year 2008. It is the genetic material found in the chromosomes, which are present in the nucleus of a cell. (i) Vegetative propagation is a cheaper, easier and more rapid method of propagation in plants than growing plants from their seeds. Free PDF Download of CBSE Class 10 Science Chapter 8 How do Organisms Reproduce? (b) Regeneration: It is the ability of a fully differentiated organism to give rise to new individual organisms from its body parts. Multiple Choice Questions with Answers to know their preparation level. Answer. If a sperm carrying X chromosome fertilises an egg which carries X chromosome, then the’ child born will be a girl. LONG ANSWER TYPE QUESTIONS [5 Marks] – Year 2012. The full form of DNA is deoxyribonucleic acid. Stamens 4. Since the newly formed copy of DNA lacks an organised cellular structure, the cell gets divided to provide cell cover to the newly formed DNA. Its two types are: Asexual reproduction and Sexual reproduction. (i) Implantation: The embedding (ii) where fusion of egg and sperm take place admin. It also explains the male and female reproductive systems, changes in the body of puberty, examples of asexual reproduction where new generations are created from a single individual. Question.39 (a) What is spore formation? plants. Questions and Answers 1. On completion of 9 months, the child is born as a result of rhythmic contractions of the muscles in the uterus. NCERT Solutions for Class 10 Science Chapter 8 explains reproduction in various organisms. Important Question for Class 10 Science How Do Organisms Reproduce PDF will help you in scoring more marks.. Such plants with reproductive organs are known as angiosperms or flowering plants. Very Short Answer Type Questions. Name four such diseases. (ii) if no fertilisation occurs? Question.17 State what type of method is used for Asexual reproduction is the process of producing new organism from a single parent without the involvement of sex cells. (a) When a slice of bread is kept in moist dark place for a few days, spores of Rhizopus present in air settle on the bread to form new fungus plants of Rhizopus. Answer. (ii) Fertilisation Free Appraisal Letter Format, Samples, Tips | How to write an Appraisal Letter? Question. Principles of Inheritance & Variation ( All ) ... Wrong Answer Wrong Explanation Wrong Question Question not related to topic Spelling Mistakes. Complete Reproduction in Flowering Plants Class 10 Notes | EduRev chapter (including extra questions, long questions, short questions, mcq) can be found on EduRev, you can check out Class 10 lecture & lessons summary in the same course for Class 10 Syllabus. SHORT ANSWER TYPE QUESTIONS [3 Marks] – Year 2007. (i) One of the male gamete fuses with the female gamete present in the embryo sac. Question.30 List any four modes of asexual reproduction. Answer. Question.50 List and explain in brief three methods of contraception. Role of DNA in the process of repro¬duction of the cell: Answer. Question.41 List two advantages of vegetative reproduction practised in case of an orange plant. Question.46 “DNA copies generated during reproduction will be similar but may not be identical to the original.” Justify this statement. These diseases can be prevented by responsible sexual behaviour such as use of condom during intercourse, etc. Anther 3. Answer. Mode of reproduction used by (a) (i) Cool place, (ii) Moist place and (iii) Dark place. This consists of 1 mark Questions, 3 Mark Numericals Questions, 5 Marks Numerical Questions and previous year questions from How Do Organisms Reproduce Chapter. (ii) What is the site of fertilisation in human beings? The flower which has both sex organs are … Question.29 Write any two differences between binary fission and multiple fission in a tabular form as observed in cells of organisms. (b) The Rhizopus consists of fine thread-like projections called hyphae. (ii) DNA in daughter cells will be able to control the functioning of daughter cells. Played 858 times. Sexual Reproduction in Plants • Flowers are the reproductive organs of plants. Question.9 Illustrate the following with the help of suitable diagrams: MCQ Questions for Class 10 Science with Answers was Prepared Based on Latest Exam Pattern. each caused due to bacterial infection and viral infection. Copper-T prevents only implantation in the uterus. Question.23 List any four reasons for vegetative propagation being practised in the growth of some type of plants. These fragments grow into new individuals. Planaria can be cut into any number of pieces and each piece grows into a complete organism. A bud develops as an outgrowth in Hydra due to repeated cell division at one specific site. (ii) Better quality of plants can be maintained by this method. of a fertilised mammalian egg (embryo) into the inner thick wall of the uterus (womb) where it will continue its development is called implantation. The developing embryo will also generate waste substances which can be removed by transferring them into the mother’s blood through the placenta. The egg gets fertilised in the oviduct. HIV stands for Human Immunodeficiency Virus. Question.16 State the method used for growing rose Answer. Answer: Unisexual flower can self-pollinate where both male and female flowers are present on the same plant. A sperm of human male carries either an X chromosome or one Y chromosome. (i) Gonorrhoea (iii) there is a labour division in the body of complex organisms. (iii)DNA copies will retain the traits. (b) Artificial Vegetative Propagation. State a reason why a more complex organism cannot give rise to new individuals through this method. Answer. Unisexual is the plant whose flowers contain either stamens or carpels but not both. Question.44 What is meant by asexual reproduction? Yes, AIDS is an infectious disease. Explore the important questions on Reproduction in Organisms for class 12 Biology along with the solutions for reference. (i) Spore formation in Rhizopus. There used to be forests all around where these buildings have been made. this method, specific drugs are used by females, which are of two types: oral pills and vaginal pills. Question.38 With the help of suitable diagrams, explain the various steps of budding in Hydra. Surgical method where either the vas deferens of male is blocked or the fallopian tube of female is blocked. The spores of the flowering plants are dispersed by wind because the spores are _____. (ii) there are specific organs to do specific functions. Question.40 State one genetically different feature between sperms and eggs of humans. 3 years ago. 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