does banana reproduce sexually or asexually

Bisexual Flower: hibiscus, rose [23], The mechanical refrigerator (first patented in the 1850s in Europe) liberated brewers and winemakers from seasonal constraints for the first time and allowed them to exit cellars and other earthen environments. Offspring obtained from gametogenesis has just one parent; there are not any chances of variation in their chromosomes. From this mass of cells, different cells undergo changes to become various cell types and tissues finally developing into a new organism. In nature, mating of haploid cells to form diploid cells is most often between members of the same clonal population and out-crossing is uncommon. Draw a neat, labelled diagram of a pistil showing pollen tube growth and its entry into the ovule. Competition for food, predation is common in nature. Organisms which bear both male and female sex organs in the same individual are called bisexual. It is easier to get rid of pathogen from any part of plant by vegetative propagation. Question 12. Answer: (b) I and III (a) Function of human female reproductive part are as follows : The first records that show this use came from Ancient Egypt. (iii) State the importance of the part C. (b) Prenatal sex determination was banned in India in 1994. (a) What is puberty? 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Actually, a pair of testes are located inside scrotum situated outside the abdominal cavity. High standard of moral education should be given to the people. After fertilization, a zygote is formed , which develops into a new organism. Number of chromosomes in both the gametes are equal hence a number of chromosomes in a female gamete of tobacco plant is 24. Advantages of vegetative propagation : Vegetative propagation is useful for plants those have lost the capacity to produce seeds, e.g. (a) Name the parts labelled as A, B, C and D in the diagram given below: It has answers to 27 MCQs, 21 short answer questions 11 long answer questions which will help you to practice questions of varying difficulty on reproduction of organisms. Style: It is the middle elongated part which connects the stigma to the ovary. The child is born as a result of rhythmic contractions of the muscles in the uterus. (iii) Uterus is the part where fertilised egg gets implanted. The flower may be unisexual i.e. In vegetative reproduction plants produced are genetically similar enough to the parent plant to have all its characteristics. What is pollination? Types of Asexual Reproduction is Unicellular Organism Answer: (ii) Scrotum: To provide optimal temperature to tstis for the formation of sperm. Gametes are not formed hence fertilisation does not take place. Answer: It plays a prominent role in origin of new species as it leads to variations which accumulate over a period of time and get carried to successive generations. It travels intercellularly and chemotropically along the concentration gradient of calcium boron inositol sugar complex. Question 146. (b) only variations with parents The NCERT Exemplar Solutions Class 10 Science Chapter 8 provides an overview of the main concepts in the chapter and helps you to get well versed with important topics such as reproduction in organisms. Brettanomyces is a significant contributor to wine faults within the wine industry. (ii) Blobs developing at the tip of hyphae are called sporangia which contain spores. Extra marital relations should be avoided helps you. (AI 2017) Name the organs producing sperms and ova respectively in humans. [56] Top-cropping yeasts are so called because they form a foam at the top of the wort during fermentation. What is DNA copying? Cross-pollination is necessary is unisexual flowers as they possess either stamen or pistil. Two agents of pollination are wind and water. Why? Cryptococcus neoformans and Cryptococcus gattii are significant pathogens of immunocompromised people. (i) Ovary is the part where eggs develop. Answer: In the list of organisms given below, those that reproduce by the asexual method are. A carpel is made up of three parts-stigma, style and ovary. Desirable character of the plant can be preserved through generation. Question 130. Answer: Sequoia sempervirens (/ s k w . Answer: The doctor refused to perform the test in order to prevent female feticide which leads to shocking drop in child sex ratio. Our experts cautiously go through the entire chapter, sample papers, and previous years question papers to prepare the perfect set of important questions from each chapter. (a) Name the human male reproductive organ that produces sperms and also secretes hormones. Refer to answer 103. Another requirement is special organs like an erectile organ called penis and organs which can carry the baby for a long period. After detaching from the parent, and if conditions are suitable, they germinate directly or indirectly into a new individual. It always results in formation of zygote. Testes secrete male sex hormone testosterone which helps in regulation of spermatogenesis and also keeps structure and function of secondary sex types like facial, axial and public hair, voice moustache, etc. The two advantages of vegetative propagation practised in case of an orange plant are : Question 25. Describe the structure of a pollen grain. (a) Refer to answers 88 (a)(i) and (b). In general, yeasts are grown in the laboratory on solid growth media or in liquid broths. The tip of the branch should remain above the ground. These pieces or fragments grow into new individuals, 9. In tubectomy small pieces of both the fallopian tubes are removed and in laparoscopy fallopian tubes are blocked with the help of an instrument named laparoscope. Maths Students who are looking for the better solutions, they can download Class 10 Maths NCERT Solutions to help you to revise complete syllabus and score more marks in your examinations. This plant part is made from the inner wall of the pollen grain. The ovary grows rapidly and ripens to form a fruit. (Foreign 2012) What is micropropagation? All nutritive elements from maternal blood pass into the fetus through it. Mechanical barrier method (use of condoms). What is AIDS? After that the cytoplasm of Amoeba divides to form two smaller Amoeba (called daughter amoebae). Artificial vegetative propagation (Tissue culture). List two unisexual flowers. Chemical methods: The chemical methods make use of specific drugs by females. In some other,stems grow horizontally and develop root below and leaves above the ground. Is this method sexual or asexual? The diseases that are spread by sexual contact with an infected person are called sexually transmitted disease (STDs). Question 39. It acts as an endocrine gland. Question 108. Answer: Why does regeneration not occur in the latter? List two advantages ofvegetative reproduction practised in case of an orange plant. (i) Use of condoms: Condoms are thin rubber tubes worn over the penis before sexual intercourse. In organisms reproducing sexually, reproduction take place with the help of formation of haploid gametes. Question 91. (2020) Which among the following statements are true for unisexual flowers? Why cannot fertilisation take place in flowers if pollination does not occur? They are produced in large numbers in the testes. After 4-5 days the zygote becomes a multicellular structure blastocyst. Answer: (Delhi 2011) Question 46. (iii) ovary ovary of pistil The diseases which spread through sexual routes are known as sexually transmitted diseases e.g., bacterial infections like syphilis, gonorrhoea and viral infections such as warts and HIV- AIDS. The ovule develops a tough coat and is gradually converted into a seed. In cross pollination pollen is transferred from one flower to another. Question 4 Sometimes symptoms may include muscle aches, fever and burning sensation at urination. Answer: It is prohibited and punishable under law. Plasmodium reproduces by multiple fission. Chemical method It involves the use of oral pills that check ovulation. (b) I and II (2008) citing Loureiro and Malfeito-Ferreira from 2006 when they affirmed that current molecular DNA detection techniques have uncovered no variance between the anamorph and teleomorph states. When offspring is produced by single parent with or without the involvement of gamete formation. Yeasts have recently been used to generate electricity in microbial fuel cells[10] and to produce ethanol for the biofuel industry. Ans: Reproduction is the process of producing new organisms of the same kind. Hence, it can be said that fertilization can occur only once in a month. The release of an ovum from the ovary into the abdominal cavity is known as ovulation. The ability of a cell to divide into several cells during reproduction in Plasmodium is called. Chemical method is not meant for males: Use of these techniques helps in maintaining health of the woman. What are the different methods of contraception? 57. Cotyledon stores food and the plumule acts as future shoot. [106], Genomic and functional gene annotation of the two major yeast models can be accessed via their respective model organism databases: SGD[107][108] and PomBase. Yeasts are eukaryotic, single-celled microorganisms classified as members of the fungus kingdom. When conditions become favourable, the cyst wall breaks and the Plasmodium are released. (a) Refer to answer 73. Difference between fission and budding is as follows: When the egg is not fertilized and the uterus has not received a fertilized egg, the lining becomes thick. ), Natural methods (rhythm method, coitus interruptus). (v) Rhizopus Testes lying in the scrotum ensures the temperature of the testes remain lower than the body temperature. Some yeasts are found in association with soil and insects. (b) Yeast. Only one parent is required for reproduction. It is a disc shaped structure embedded in the uterine wall. Name and explain with the help of labelled diagram the process by which Hydra reproduces asexually. The four modes of asexual reproduction other than fission in living organisms are : Question 19. Female germ cell fertilise with male germ cells to forms zygote which develops into an embryo within the ovule. It receives the pollen grains from the anther of stamen. banana, rose, jasmine. Illustrate with example the division and fragmentation method of reproduction in living organisms. This is because sexual reproduction gives rise to more variations which are essential for evolution as well as for the survival of species under unfavourable conditions. (c) plasmodium The pollen tube eats its way through the solid part of the stigma and style by secreting pectinases and hydrolytic enzymes. Why is DNA copying an essential part of the process of reproduction? Each seminal vesicle releases its contents into the ejaculatory duct during ejaculation. (a) Amoeba It develops a basal disc at the point of attachment with the parent organism and finally gets detached to lead an independent life. Three contraceptive methods which can help to control human population are: (Delhi 2012) Why is variation possible in the progeny of sexually reproductive individuals? Is the chromosome number of zygote, embryonal cells and adult of a particular organism always constant? What is multiple fission? is an important study resource for CBSE Class 10 students. 28. The child is bom as a result of rhythmic contractions of the muscles in the uterus after nine months (36 weeks) of development inside the mothers womb, called Gestation Period. Yeasts vary in regard to the temperature range in which they grow best. Question 1. Question 1. In few organisms parent cell divides into many daughter cells simultaneously which is termed as multiple fission. Stamen is the male reproductive part and it produces pollen grains. (b) Reproduction needs a lot of energy. This helps in sperm production. Question 3. Both the gametes are microscopic unicellular and have half the number of chromosomes as compared to the body cells. (i) (a) Hyphae/mycelium, 2. In multiple fission organisms divide into many daughter cells simultaneously. Answer: 1. (i) Bacterial infections Since these two gametes fuse during fertilisation, the original number of chromosomes (as in the parent) is restored in the offspring. Answer: Question 115. Because of the contribution of two parents, off-springs incur more variations. Ans: Reproduction is necessary to maintain the balance in nature. If kept in soil with Adventitious L adequate moisture, it develops into a new plant. The different methods of contraception are as follow : Answer: Sexual and asexual reproduction may require different sets of conditions (e. g., nutrients, temperature, light, moisture). Define parturition. (Delhi 2016) (Foreign 2012) Answer: (i) Name the part marked A in the diagram. Ans: Syphilis is caused by bacteria. Question 40. 7. Answer: Question 1. Why is it said that sexual reproduction promotes diversity of characters in the offspring? Question 41. It is a link between the mother and the foetus. Answer: Examples of STD are Syphilis and gonorrhea. The process starts by milling a feedstock, such as sugar cane, field corn, or other cereal grains, and then adding dilute sulfuric acid, or fungal alpha amylase enzymes, to break down the starches into complex sugars. Vagina. Reproduction is the creation of a new individual. IUCDs prevent implantation in the uterus. (Foreign 2016) The male gonads in human beings are a pair of testes. Stigma is sticky so that pollen can stick to it so that fertilisation can occur. DNA replication during reproduction ensures transfer of specific characters or body design features that is essential for an individual of a population to live and use that particular niche. Moreover, all plants produced through vegetative propagation are genetically similar to the parent plant. List in tabular form the two differences between asexual and sexual mode of reproduction. Name the two reproductive parts of a bisexual flower which contain the germ cells. It is a 28-day cycle which occurs in every reproductively active female (from puberty). Secretion of female sex hormones (estrogen and progesterone). Each fragment has the capacity to form a new individual. The sperms are highly active and mobile. 54. Refer to answer 89. New plants produced by vegetative propagation maintain the desirable characters of the parents. The appearance of a white, thready yeast, commonly known as kahm yeast, is often a byproduct of the lactofermentation (or pickling) of certain vegetables. The chapter carries several important topics that can be asked for 1, 2, 3, and/or 5 marks. 2. Yeast species either require oxygen for aerobic cellular respiration (obligate aerobes) or are anaerobic, but also have aerobic methods of energy production (facultative anaerobes). (i) that produces egg Asexual reproduction involve single parent and there will be no exchange of gametes hence offspring looks similar to their parent. buds produced in the notches along the leaf margin of Bryophyllum fall on the soil and develop into new plants. How are spores produced in sporangia of Rhizopus? (a) Threadlike non-reproductive structures present in Rhizopus. How does their use have a direct effect on the health and prosperity of a family? After this, yeasts are added to convert the simple sugars to ethanol, which is then distilled off to obtain ethanol up to 96% in purity. During spore formation, knob like structure called sporangium develops from the fungal hypha. Question 5. Better sex education and awareness help to maintain the population and prevent a population explosion. It runs through a muscular organ called Penis. Several contraceptives are available in the market today are a follows: We also know that there are several deadly diseases like AIDS that can be transmitted sexually. It cannot prevent a women from sexually transmitted diseases. Function of the fallopian tubes: It is the site of fertilization between the male and the female gametes and formation of the zygote early embryo. Important topics and shortcut tips should be memorised to understand to write down a perfect answer. (Delhi 2014) (a) The sectional view of human female reproductive system is as follows: Answer: Those are the anamorphs Brettanomyces bruxellensis, Brettanomyces anomalus, Brettanomyces custersianus, Brettanomyces naardenensis, and Brettanomyces nanus, with teleomorphs existing for the first two species, Dekkera bruxellensis and Dekkera anomala. Write the full form of IUCD, AIDS, HIV, OC. Ans: Difference between fission and budding is as follows: In fission the parent organism divides into two or multiple new cells. Question 38. Write the functions of the following in human female reproductive system. 4. (b) Asexual reproduction by multicellular organisms: After implantation, a disc-like special tissue develops between the uterus wall (called uterine wall) and the embryo (or fetus), which is called placenta. 3. If the ovary does not get fertilized, its lining becomes thick and spongy. (ii) fruit. They possess either stamen or pistil. After penetration, the tip of pollen tube ruptures releasing two male gametes into the embryo sac. Offspring has exactly similar features with the parent. Answer: Fragmentation Multi-cellular organisms with simple body structure simply break into two or more parts upon maturation. 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