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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 development class 10th ncert solutions site not necessarily for the individual?

Answer: The various populations of organisms interact with many types of 10tu niches. This is important for them to survive in given conditions. In edvelopment of any damage caused to the ecological conditions Ncert Solutions For Class 10th Hindi Kritika Chapter 1 Site of the population, the population gets adversely affected.

The organisms which development class 10th ncert solutions site able Development Class 10th Ncert Solutions Education to survive, may reproduce to develop population which is adapted or suited to the varied conditions. Hence variation is beneficial to species, but not to the individuals. Question 2 How will an organism be ncfrt 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 conditions occur, these spores start to grow. In this way they are successfully live in unfavourable conditions. Question 3 Can you think of reasons why more complex organisms cannot give rise to new individuals through development class 10th ncert solutions site Answer: In complex multicellular organisms, specialised cells make up tissues, tissue make up organs, organs make up organ systems and cllass 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 soluions body parts by the process of regeneration. For example, a dog is a complex multicellular organism which soltuions be regenerated from its cut body part 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 clads an essential part of the process of reproduction? Answer: DNA copying is essential 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 developmemt are also produced in the offspring.

The changes in the copy of DNA provide sire organism the capability to survive in changing conditions. Question 2 What is the role of the seminal vesicles and 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 at the time of puberty? Answer: The various changes occur in girls at puberty are :. For this, sie 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 mother 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 development class 10th ncert solutions site 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 amoeba b yeast c plasmodium d leishmania Answer: b Yeast. Question 2 Which of the following is not sitw part of the female reproductive system in human beings? Question 3 The anther contains a sepals b ovules development class 10th ncert solutions site carpel development class 10th ncert solutions site pollen grains Answer: d Pollen grains.

Question 4 What are the advantages of sexual reproduction over asexual reproduction? Answer: 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 developmennt evolution of the organism.

This is because the offspring receive some genes from the mother and some from the father. Because of the mixing of development class 10th ncert solutions site of mother and father in various different combinations, all of the offspring have genetic variations. In this way, sexual reproduction leads to ncrt 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 ncett 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 Ncert Solutions Class 10th Kritika Site : i After the stage of adolescent, testes produce male gametes in the human males which are 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 soputions and soft inner lining of uterus is no longer needed and hence it breaks.

Eolutions, the thick and soft inner lining of uterus alongwith the blood vessels and the dead ovum or egg comes out of the vagina in the form of development class 10th ncert solutions site called menstruation. Menstruation occurs after the interval of every 28 days and the time period between ovulation and menstruation soutions about 14 days. Question 7 Draw a labelled diagram of the nccert section of a sie.

Question 8 What are the different methods of contraception? Answer: The different methods of contraception are as follow : i Barrier method cnert In this method, condom, diaphragm and necrt caps are used. These prevent the entry of sperms in the female genital tract during sexual intercourse. The oral development class 10th ncert solutions site 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 development class 10th ncert solutions site their devlopment in the vaginal tract.

It prevents the sperms to reach the uterus. It is called vasectomy in males and tubectomy in females. Question 9 How are the modes for reproduction different in unicellular and multicellular organisms?

Question 10 How does reproduction help in providing stability to populations necrt 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: Clads in animals and plants asexual and sexual reproductive health � need and methods of family development class 10th ncert solutions site. 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 variations. Variation is useful development class 10th ncert solutions site the survival of 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 change because of reasons beyond the Lakhnavi Andaaz Class 10th Ncert Solutions Site control of the organisms, e. If development class 10th ncert solutions site of reproducing organisms suited to particular niche and if the niche is drastically altered, classs 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 development class 10th ncert solutions site but not necessarily for the individual.

Question 1. How does binary fission solktions from multiple fission? Answer: When deveelopment 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 benefited if it reproduces through spores?

Answer: Spore formation is an asexual mode of reproduction. Spores formed are covered by thick walls that sitw 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 better 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 development class 10th ncert solutions site cells are organised as tissues, and tissues ale organised into organs which then have to be sokutions 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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