(a) Seminal vesicles/prostate gland (b) Testes (c) Placenta (d) Fallopian tube. Which one of these techniques is not meant for males? (a) Leishmania and Plasmodium reproduce by fission (asexual mode of reproduction). In bryophullum, vegetative propagation occurs through leaves where buds occur while in rose leaves do not form buds. This stops releases of gametes, preventing fertilisation. (ii) Leaf of Bryophyllum has buds on its margins. (e) Vegetative propagation. State two advantage and two disadvantage of this method. It is type of multiple fission and termed as schizogony. After fertilisation the ovule develops a tough coat and it gradually converted into a seed. Name the parts of the flower that develop into (i) Seed and (ii) fruits after fertilisation. Numbers of individual daughters are produced. In such cases the nucleus undergoes several mitotic divisions, producing a number of nuclei. Describe its structure. Hence it reproduces by fragmentation. By continuing, I agree that I am at least 13 years old and have read and Testis are located outside the abdominal cavity, in the scrotum to provide right temperature. Multiple fission is a form of asexual reproduction that occurs within certain protozoa such as Plasmodium. a. Budding b. Plasmodium c. Both a and b d. None of these. Explain how pollination leads to fertilisation. Asexual reproduction of Plasmodium occurs in man. Students can take an idea about the questions which are asked in CBSE Board exams. [CBSE 2011, 2012, 2013, 2015, 2016, 2017], (a) Which device prevents implantation by irritating the lining of uterus? (iii) Banning certain ill practices in our society like dowry system. [CBSE 2013], Write the source of making proteins in the cell information. Here, the nucleus of the organism divides repeatedly to form a number of equal sized daughter nuclei and each daughter nuclei breaks away together with a small portion of the cytoplasm. These diseases are curable. (iii) The second male gamete fuses with the two polar nuclei to form triploid PEN. Examples: (i) Sugar came is grown by using stem cuttings. Yeast a unicellular fungus reproduces by budding. (iii) DNA copying is as essential process toward formation of new cells. In Plasmodium multiple fission occurs in the schizont (rounded unicellular structure present in liver cell and RBC of the man) as well as oocyst (encysted zygote) present on the stomach of female anopheles. Give three reasons in support of the statement. (d) Carries egg from ovaries to the womb. It chooses multiple fission, asexual mode of reproduction for producing the cells. Following are the disadvantages: (a) All plants are genetically identical to the parent plant and hence no variation. Give you feedback and suggestion to make the Tiwari Academy website better and more user friendly. The organisms splits into two daughter cells example Amoeba. 2. Genes possessed by new plant will be same as that of parent plant, resulting in formation of clones. Leishmania -: It reproduces by binary fission, but takes place in a definite orientation as it has whip like structure at its one end. Organisms produced by asexual reproduction contain exactly the same chromosomes as the parent cell have. If pollination does not occur male gamete is not available. [CBSE 2011], Name the part that produces egg and the one that carries it to the womb. Variation are created in a population in different ways: (i) There may be minor changes/errors during DNA copying mechanisms which happens before any cell division. (a) Multicellular organisms with cell differentiation, when cut in small pieces, may regrow into complete organisms, e.g. This is called implantation. [CBSE 2016], Discuss briefly the different types of reproduction. Man is considered to be the primary host in which schizogony occurs in liver and blood, and female Anopheles mosquito is the secondary or intermediate host in which gametogony and sporogony takes place. 4: Occurs in a favorable condition. The ability of a cell to divide into several cells during reproduction in Plasmodium is called (a) budding (b) multiple fission (c) binary fission ... Asexual reproduction occurs before sexual reproduction. Different methods of contraception are: (i) Barrier method- Where physical like condoms (worn over penis), diaphragm (used by female), cervical cap and Copper-T (an IUCD) are used. After fertilisation the ovary grows rapidly and ripens to form a fruit. [CBSE 2008, 2015], (a) In the human body what is the role of (i) seminal vesicles and (ii) prostate gland? The organ that produce sperms is Testis. Four mode of asexual reproduction are: (a) Fission- Parent cell divides to form two or more daughter cells. This process is known as regeneration. [CBSE 2012], Name any two sexually transmitted diseases. Sperms have to swim to reach the female gamete, which is stationary. Finally, the multinucleated body divides into as many parts as the number of daughter nuclei and forms daughter individuals. Similarities Both are types of asexual reproduction. 2: The nucleus of the parent body divides only once. (iii) Surgical method- Portion of vas deferens in male (vasectomy) or portion of fallopian tube in female (tubectomy) is cut or ligated. Than plasmodium passes through different stages such as signet ring stage, amoeboid stage and erythrocytic merozoites. Most of the questions are taken from last five years CBSE Board Papers but the important questions from last ten years are also included for practice. (b) (i) Leishmania reproduce by binary fission in which the parent organism splits to form two new organisms. [CBSE 2016, 2017], List any four modes of asexual reproduction. (i) Appearance of pubic hair. Class 10 Science Chapter 8 Board Questions of How do Organisms Reproduce. [CBSE 2013], State the mode of reproduction in plasmodium. (i) Sexual reproduction. The parent organism split to produce many new organism at same time For Ex:Malarial Parasite (Plasmodium) Filed Under: Class 10, How do organism Reproduce Tagged With: amoeba, binary fission, fission, leishmania, multiple fission, paramecium, single celled organism. During gamete formation one chromosomes from each pair goes to a gamete. The nucleus of the parent divides repeatedly. The zygote develops to form embryo which later forms complete plant. Question 12. (a) (i) Male gametes (sperms) and male hormone testosterone are produced by testis. (ii) Information the inheritance of features from parent to next generation is present within chromosomes in the form of DNA. Plasmodium -: It reproduces by multiple fission in which it divides itself into many daughter cells simultaneously and inside its cell wall … 3: No residue is left. It is known as erythrocytic schizogony . Can you explain this answer? (iv) Any vegetative plant part can be used. Fission of Plasmodium. Disease caused by viral infection is AIDS. (b) Secretes the hormone that regulates formation of sperms. [CBSE 2013], Name an STD which damages the immune system of human body. [CBSE 2017], What is meant by pollination? Multiple fission (b) Spore formation. (iv) Also prevention of sexually diseases on using condoms. [CBSE 2008, 2010], Name the organ where the sperms are produced and name the hormone produced by it. Agencies of pollination are- wind, water, insects, birds and animals. (ii) Buds may remain attached to the parent body. These gametes are produced by gonads testis in males and ovary in females. [CBSE 2012, 2013], Describe the process of budding as seen in yeast? If the answer is not available please wait for a while and a community member will probably answer this [CBSE 2011], What is placenta? Asexual type of reproduction takes place in unicellular organisms, some plants and certain multicellular animals like sponges and Hydra. a. Uterus b. Cervix c. Oviduct d. None of these. [CBSE 2017, 2018], NCERT Solutions for Class 6 Social Science, NCERT Solutions for Class 7 Social Science, NCERT Solutions for Class 8 Social Science, NCERT Solutions for Class 9 Social Science, NCERT Solutions for Class 10 Social Science, NCERT Solutions for Class 11 Business Studies, NCERT Solutions for Class 11 Physical Education, NCERT Solutions for Class 12 Business Studies, NCERT Solutions for Class 12 Physical Education, CBSE Sample Papers for Class 10 Session 2020-2021, CBSE Sample Papers for Class 12 Session 2020-2021, Class 10 Science Chapter 9 Board Questions. (b) Budding. Along the path of the vas deference these glands add their secretions so that the sperms are now in fluid which make their transport easier and this fluid also provides nutrition to sperms. Explain binary fission in Leishmania. These can be prevented by use of condoms during sexual act. Question 21. [CBSE 2015], List two reasons for the appearance of variations among the progency formed by sexual reproductive. Name any two areas related to reproductive health which have improved over the past 50 years in our country. [CBSE 2008], What are the two main methods of reproduction?
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