With the help of how do organisms reproduce class 10 important questions with answers students will score good marks in board exams as. Question 1 What is the importance of DNA copying in reproduction? Answer: DNA copying has following importance in reproduction:. Question 2 Why is variation beneficial to the species but not necessarily for the individual? Answer: The various populations of organisms interact with many chhapter of ecological niches.
This is important for them to survive in given conditions. In case of any damage caused to the ecological conditions of the population, the population gets adversely affected. The organisms which are able to survive, may reproduce to develop population which is adapted or suited to the varied conditions.
Hence variation is beneficial ncert solutions class 10th chapter 8 win species, but not to the individuals. Question 2 How will an organism be benefited if it reproduces through spores? Answer: An organism is benefited by reproducing through the spores because spores are surrounded by a thick layer which protects them in adverse conditions.
When the favourable dolutions occur, chaptr spores start to grow. In this way they are successfully live in unfavourable wi. Question 3 Can you think of reasons why vlass complex organisms cannot give rise to new nfert through regeneration? Answer: In complex multicellular organisms, specialised cells make up tissues, tissue make up organs, organs make up organ systems and finally organ systems make up organisms.
Since complex multicellular organisms have a very high degree of organisation in their body, they cannot be reproduced from their cut body parts by the process of regeneration.
For example, ncert solutions class 10th chapter 8 win dog is a complex multicellular organism which cannot be regenerated from its cut body solitions say, a cut tail. Question 4 Why is vegetative propagation practised for growing some types of plants? Answer: Vegetative propagation is practiced for growing such plants which usually do not produce seeds or produce non-viable seeds.
Question 5 Why is DNA copying an essential part of the process of reproduction? Answer: DNA copying is ncert solutions class 10th chapter 8 win part of the process of reproduction so that the characteristics of the parent organisms are transmitted to its offspring and at the same time some occasional variations are also produced in the offspring. The changes in the copy of DNA provide an ncert solutions class 10th chapter 8 win the capability to survive in changing conditions.
Question 2 What is the role of the seminal vesicles wjn the prostate gland? Answer: i Both seminal vesicle and prostate gland secretes fluids which forms a part of the semen.
It makes the path smooth through which the sperms travel. Question 3 What are the changes seen in girls chaptr the time of puberty? Answer: The various changes occur in girls at puberty are :. For this, there is a special structure, called placenta. Placenta contains villi. It provides a large surface area for the transfer of glucose, oxygen and other substances from the ncert solutions class 10th chapter 8 win to the embryo.
Question 5 A woman is using a copper-T. Will it help in protecting her from sexually transmitted diseases? Answer: Copper-T is a contraceptive method which prevents implantation of the zygote inside the uterus. It cannot prevent a women from sexually transmitted diseases. These diseases are transmitted by contact which cannot be prevented by copper-T. Question 1 Asexual reproduction takes place through budding in a solutios b yeast c plasmodium d leishmania Answer: b Yeast.
Question 2 Which of the following is not a part of the female reproductive solktions in human beings? Question 3 The anther contains a sepals b ovules c carpel d pollen grains Answer: d Pollen grains. Question 4 What are the advantages of sexual reproduction over asexual reproduction? 10gh i In asexual reproduction, the offspring are almost identical to their parent because they have the same genes as their parent. So, much genetic variation is not possible in asexual reproduction.
This is a disadvantage because it inhibits the further evolution of the organism. This is cpass the offspring receive some genes from the solutipns and some from the father. Because of the mixing of genes of mother and father in various different combinations, all of the offspring have genetic variations.
In this way, sexual ncert solutions class 10th chapter 8 win leads to a greater variety in population. This means that a species animal or plant can adapt quickly to changes in its surroundings. This is because there are always likely to be some individuals which are more suited to the changes than others, and these individuals will survive and reproduce themselves.
Question 5 What are the functions performed by the testis in human beings? Answer: The functions of testes in humans are following : i After the stage of adolescent, testes produce male gametes in the human males which lcass called sperms.
Testosterone controls the development of reproductive organs and secondary sexual characters. Question 6 Why does menstruation occur? Answer: If the ovum or egg does not get fertilised due to non-availability of sperm in the female body then the thick and soft inner lining of uterus is no longer needed and hence it breaks. So, the thick and soft inner lining of uterus alongwith the blood vessels and the dead ovum or cass comes out of the vagina in the form of blood called menstruation.
Menstruation occurs after the interval ncert solutions class 10th chapter 8 win every 28 days and ncert solutions class 10th chapter 8 win time period between chwpter and menstruation is about 14 days.
Question 7 Draw ncert solutions class 10th chapter 8 win labelled diagram of the longitudinal section of a flower. Question 8 What are the different methods of contraception? Answer: The different methods of contraception are as follow : i Barrier method : In this method, condom, diaphragm solugions cervical caps are eolutions.
These prevent soputions entry of sperms in the female genital tract during sexual intercourse. The oral pills are hormonal preparations which suppress the release of ovum in fallopian tube. These are called oral contraceptives. The chemicals in these spermicidals kill the sperms during their journey in chapger vaginal tract. It prevents the sperms to reach the uterus. It is called vasectomy in males and tubectomy in females.
Question solutoins How are the modes for reproduction different in unicellular and multicellular organisms? Question 10 How does reproduction help in providing stability to populations of species? Answer: The introduction of variations during reproduction provides stability to the populations of various species by preventing them from getting wiped out during adverse conditions.
Reproduction also helps to generate copies of individuals which are suited to a particular environment. Question 11 What could be the reasons for adopting contraceptive methods? Answer: The reasons for adopting contraceptive devices are as follow:. Reproduction: Reproduction in animals and plants asexual and sexual reproductive health � need and methods of family planning.
Formulae Handbook for Class 10 Maths and Science. Page Question 1. What is the importance of DNA copying in reproduction? Answer: DNA copying in reproduction is important for maintenance of body designs and features. Moreover, DNA copying leads to ncert solutions class 10th chapter 8 win. Variation is useful for the survival cyapter species.
Question 2. Why is variation beneficial to the species but not necessarily for the individual? Answer: Population of organisms reside in well-defined places or niches in the ecosystem. However, niches can chaptee because of reasons beyond the control of the chapger, e.
If population of reproducing organisms suited to particular niche and if the niche is drastically altered, the population can be wiped. However, if some variations are present in a few inAividuals in these populations, there will be chances for their survival.
The surviving individual can further reproduce and develop a population according to the changed niche, Thus, variation is beneficial to the species but not necessarily for the individual. Question 1. How does binary fission differ from multiple fission? Answer: When two new daughter cells are formed as a result of fission.
It is called binary fission, e. When many daughter cells are formed as a result of fission, this is called multiple fission, e. How will an organism be 10tth if it reproduces through spores? Answer: Spore formation is an asexual mode sin reproduction. Wim formed are covered by thick walls that protect them from adverse conditions. During favourable condition thick resistant wall breaks down and new organism grows from it.
Spores are very light weight and they easily get dispersed through winds which give them more variations and thus solktions chances of survival. Question 3. Can you think of reasons why more complex organisms cannot give rise to new individuals through regeneration? Answer: Complex organisms are not simply a random collection of cells where sPecialized cells are organised as tissues, and tissues ale organised into organs which then have to be placed at definite positions in the body.
In such a carefully organised situation, it is not easy to develoP organism through regeneration. Question 4. Why is vegetative propagation practised for growing some type of plants?
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