NCERT Solutions for Class 10 Science Chapter 8 How do Organisms Reproduce?
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NCERT Solutions for Class 10 Science Chapter 8 How do Organisms Reproduce?: is the NCERT Class 10 Science chapter 8. Various organisms use different modes of reproduction depending on their body design. Also, in fission, many bacteria and protozoa simply divide into two or more daughter cells and organisms such as hydra can regenerate if they are broken into pieces. Such facts with a lot of examples are given in NCERT solutions for Class 10 Science chapter 8 How do Organisms Reproduce. All the question given in chapter 8 of the NCERT Class 10 Science book are answers in these How do Organisms Reproduce Class 10 solutions. In the NCERT Solutions for class 10 Science chapter 8, you are also going to study sexual and asexual reproduction in humans and plants.
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NCERT Solutions Class 10 Science Chapter 8: After going through the NCERT solutions for class 10 science, students will get the solutions for the questions given in NCERT textbook. The details solutions to the NCERT textbook questions are given so that students can compare their solutions to the model ones. NCERT Solutions for Class 10 Science Chapter 8 How do Organisms Reproduce briefly explains the NCERT textbook exercise and questions. Candidates will be able to achieve high marks in the science subject by using the how do organisms reproduce class 10 NCERT solutions. Read on to find out everything about NCERT Solutions class 10 science chapter 8 how do organisms reproduce?.
NCERT Solutions for Class 10 Science Chapter 8 How Do Organisms Reproduce?: Topics And Subtopics
Let's take a quick look at the topics and subtopics covered in NCERT Solutions For Class 10 Science Chapter 8 How Do Organisms Reproduce? before diving into the specifics of how do organisms reproduce class 10 extra questions and answers:
- How Do Organisms Reproduce?
- Do Organisms Create Exact Copies Of Themselves?
- Modes Of Reproduction Used By Single Organisms
- Sexual Reproduction
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NCERT Solutions for Class 10 Science Chapter 8 Intext Questions
Topic 8.1 Do organisms create exact copies of themselves: Page Number 128
Q. 1. What is the importance of DNA copying in reproduction?
Answer:
Importance of DNA copying in reproduction-
- It keeps the characteristics of the parent species
- the characteristics and features are transferred to their progeny
- It produces variation in an organism which is the basis of the evolution of new species
Q. 2. Why is variation beneficial to the species but not necessarily for the individual?
Answer:
Variations are beneficial for the survival of the species. Populations of organisms fill well-defined places in the ecosystem, using their ability to reproduce. However, these places can change because of reasons beyond the control of the organisms and could even wipe out the entire population. However, if some variations were to be present in a few individuals in these populations, there would be some chance for them to survive.
For example - If there were a population of bacteria living in temperate waters and suppose the water temperature was to be increased by global warming. Most of these bacteria would die, but the few heat resistant variants would survive and grow further. Variation is thus useful for the survival of species over time.
How do Organisms Reproduce Class 10 Topic 8.2 Modes of Reproduction Used by Single Organisms: Page Number 133
Q. 1. How does binary fission differ from multiple fission?
Answer:
Difference between binary fission and multiple fission-
| BINARY FISSION | MULTIPLE FISSION |
| 1. An organism divides into two similar organism. | 1. An organism produces two or more organism. |
| 2. Does not form any layer. | 2. A cryst or thick layer is formed around the cell. |
| 3. It generally occurs in optimal condition. example- Amoeba | 3. It can take place in any conditions. example- Malarial parasite, Plasmodium |
Q. 2. How will an organism be benefited if it reproduces through spores?
Answer:
An organism is benefited if it reproduces through spores because spores are surrounded by a thick layer and due to this they can be protected in adverse conditions. In favourable condition, these spores continue to grow again.
In this way, they can manage to survive in unfavourable condition.
Answer:
Simple organisms like Hydra and Planaria can produce a new individual through the process of regeneration. However, In a complex multicellular organism have an organ-system level of organisation. Each organ systems of their body work together as an interconnected unit.
They have a high degree of organisation in their body. So, they cant be reproduced from their cut body parts by the regeneration process.
Q. 4. Why is vegetative propagation practised for growing some types of plants?
Answer:
Vegetative propagation- This method is used for growing certain types of plant which usually does not give any seed or produce non-viable seeds.
It is also used for plants growing which bears the superior traits because they produce genetically identical plants.
Q. 5. Why is DNA copying an essential part of the process of reproduction?
Answer:
DNA copying is an essential part of the process of reproduction so that the characteristics of the parent species are transmitted to it's down the line (offspring) and at the same time some variation also produced in the offspring.
This changes in the DNA provides an organism with the capability to survive in the changing condition.
NCERT solutions class 10 science chapter 8 how do organisms reproduce topic 8.3 Sexual reproduction: Page Number 140
Q. 1. How is the process of pollination different from fertilisation?
Answer:
Difference between pollination and the fertilization-
Pollination is the transfer of pollen grains from another stamen to the stigma of a capel. It takes place by certain pollinating agents such as air, water, birds and some insects etc.
On the other hand, fertilisation occurs when the male and female gametes fuse. It occurs inside the ovule and leads to the zygote formation.
Q. 2. What is the role of the seminal vesicles and the prostate gland?
Answer:
The role of the seminal vesicles and the prostate gland-
(i) Both secrets fluids which forms a part of the semen. The fluid of seminal vesical form 60% of the semen and the rest are from the prostate glands. It makes the path smooth through which sperm travels.
(ii) This fluid protects the sperm from the acid present in the urethra
(iii). Also, they can provide nutrition to the sperm in the form of calcium, fructose and some enzymes.
Q. 3. What are the changes seen in girls at the time of puberty?
Answer:
At the age of puberty, The following changes occur in girls-
- Mammary glands develop and enlarge.
- Hair grows under armpits and pubic region.
- Fallopian tube, uterus and vagina enlarge
- Menstruation starts
- Ovaries start to release eggs.
Q. 4. How does the embryo get nourishment inside the mother’s body?
Answer:
Inside the mother's body embryo gets nourishment from the mother's blood. There is a structure called placenta, it contains villi.
This provides a large surface area for glucose and oxygen to pass from the mother to the embryo.
Q. 5. If a woman is using a copper-T, will it help in protecting her from sexually transmitted diseases?
Answer:
No, Copper-T is a contraceptive method which prevents the formation of zygote inside the uterus.
It cannot prevent a woman from Sexually Transmitted Diseases.
NCERT Solutions Class 10 Science Chapter 8 How do Organisms Reproduce Exercise:
Q. 1. Asexual reproduction takes place through budding in
(a) amoeba.
(b) yeast.
(c) plasmodium.
(d) leishmania.
Answer:
The correct option is (b). In asexual reproduction, an offspring is reproduced from a single parent species. Yeast can reproduce by budding methods.
Q. 2. Which of the following is not a part of the female reproductive system in human beings?
(a) Ovary
(b) Uterus
(c) Vas deferens
(d) Fallopian tube
Answer:
The correct option is (c). Except for vas deferens, all the options are part of the female reproductive system. Vas deferens is a duct which conveys sperm from the testicle to the urethra.
Q. 3. The anther contains
(a) sepals.
(b) ovules.
(c) pistil.
(d) pollen grains.
Answer:
The correct option is (d). The anther is a part of stamen which contains pollen grains.
Q. 4. What are the advantages of sexual reproduction over asexual reproduction?
Answer:
Advantages of sexual reproduction:
- In sexual reproduction, more variations are produced. Thus, it ensures the survival of species in a population.
- The newly formed individual has characteristics of both the parents.
- Variations are more viable in sexual mode than in asexual one. This is because, in asexual reproduction, DNA has to function inside the inherited cellular apparatus.
Q. 5. What are the functions performed by the testis in human beings?
Answer:
The function of testis-
- It produces male gametes called sperms.
- It produces a hormone called testosterone which controls the development of reproductive organs and secondary sexual characters.
Q. 6. Why does menstruation occur?
Answer:
If the egg of the female does not get fertilised with the sperm, then the thick and soft lining of the uterus is no longer needed, and thus it breaks. Therefore, the lining of the uterus along with the blood vessels and the dead ovum (egg) comes out from the vagina in the form of blood called menstruation.
Q. 7. Draw a labelled diagram of the longitudinal section of a flower.
Answer:
Labelled diagram of the longitudinal section of a flower - 
Q. 8. What are the different methods of contraception?
Answer:
The different method of contraception are as follows-
- Barrier method- In this method, condom, diaphragm and cervical caps are used. They prevent the entry of the sperm inside the female body during intercourse.
- Chemical method- In this method, women uses pills to suppress the release of an ovum in the fallopian tube.
- Contraceptive devices- Intrauterine contraceptive devices such as copper-T are placed in the uterus, and it prevents the sperms from reaching the uterus.
- Surgical method- In this method, vas deferens of the male and fallopian tube of the female is cut or tied by surgery.
Q. 9. How are the modes for reproduction different in unicellular and multicellular organisms?
Answer:
Difference between mode of reproduction in a unicellular and multicellular organism-
| IN UNICELLULAR | IN MULTICELLULAR |
| 1. Asexual reproduction takes place in the unicellular organism. 2. Only one Parent is required to produce offspring. 3. No special cells and organs are present for reproduction. | 1. Sexual reproduction takes place in the multicellular organism. 2. A male and female both are required in this method. 3. Special cell and organs are presents for reproduction |
Q. 10. How does reproduction help in providing stability to populations of species?
Answer:
The variation due to the reproduction gives stability to the population of various species by preventing them from getting erased during adverse condition. Reproduction also helps to produce copies of individuals which are adapted for a particular environment.
Q. 11. What could be the reasons for adopting contraceptive methods?
Answer:
The reasons for adopting contraceptive methods are-
- To control the birth rate. So that we can prevent an increase in population.
- To prevent from STDs
- To prevent unwanted pregnancy.
CBSE NCERT Solutions for Class 10 Science - Chapter wise
| Chapter No. | Chapter Name |
| Chapter 1 | Chemical Reactions and Equations |
| Chapter 2 | Acids, Bases, and Salts |
| Chapter 3 | Metals and Non-metals |
| Chapter 4 | Carbon and its Compounds |
| Chapter 5 | Periodic Classification of Elements |
| Chapter 6 | Life Processes |
| Chapter 7 | Control and Coordination |
| Chapter 8 | How do Organisms Reproduce? |
| Chapter 9 | Heredity and Evolution |
| Chapter 10 | Light Reflection and Refraction |
| Chapter 11 | The Human Eye and The Colorful World |
| Chapter 12 | Electricity |
| Chapter 13 | Magnetic Effects of Electric Current |
| Chapter 14 | Sources of Energy |
| Chapter 15 | Our Environment |
| Chapter 16 | Sustainable Management of Natural Resources |
NCERT Solutions for Class 10 Science Chapter 8 - Types of Questions and Their Weightage in Board Exams
From Chapter 8 of Science, very short answer, short answers, long answers and practical based questions as asked in Class 10 CBSE Science board exam. These questions range between the 1 mark and 5 marks.
This chapter carries a weightage of 8-10 marks in the exam. NCERT solutions for Class 10 Science chapter 8 aids students to get those 8-10 marks in board exams if they go through the solutions thoroughly.
NCERT solutions are available for Classes 6 to 12. Also, check NCERT solutions for Class 10 for other subjects.
More about How do Organisms Reproduce Class 10 Science Solutions
Reproduction, unlike other life processes, is not essential to maintain the life of an individual organism. Such fact is presented and explained in How do Organisms Reproduce solutions .
Reproduction involves the creation of a DNA copy and additional cellular apparatus by the cell involved in the process.
In this chapter, you are going to study broadly on three topics:
- Modes of reproduction used by single organisms
- Sexual and asexual reproduction
- Do organisms create exact copies of themselves
Solutions of NCERT Class 10 - Subject-Wise
Benefits of NCERT Solutions Class 10 Science Chapter 8 - How do Organisms Reproduce
- Important tips and facts are given in NCERT solutions for Class 10 science chapter 8 with the appropriate examples and diagrams which aids to remember topics easily.
- There is a concept behind every question. Such concepts have been explained in the Class 10 Science Chapter 8 NCERT solutions.
- Examples given in NCERT Class 10 Science chapter 8 solutions are based on real-life scenarios. Therefore, students can relate them to their surroundings.
Highlights of NCERT Solutions for Class 10 Science Chapter 8 How do Organisms Reproduce?
- The NCERT (CBSE) Syllabus and Books are strictly followed in the how do organisms reproduce class 10 solutions.
- ch 8 science class 10 are easy-to-understand and comprehensive
- On this page, you will find clear and concise solutions to class 10 chapter 8 science.
- The how do organisms reproduce class 10 pdf help clear doubt and give in-depth knowledge of concepts.
- Class 10 science chapter 8 question answer are prepared by subject matter experts in the easiest possible way.
- All the exercise questions and in-text solved questions are available in the chapter 8 science class 10 pdf.
- Stepwise solutions are provided herein how do organisms reproduce class 10 questions and answers.
- Diagrams are provided in class 10 science chapter 8 pdf wherever required to better understand.
- class 10 science ch 8 solutions will help you to score good marks in board exams.
- how do organisms reproduce class 10 questions and answers pdf are accessible to everyone at any time anywhere without any difficulty.
- This page contains a free how do organisms reproduce class 10 ncert solutions pdf.
- For CBSE exams, Science Olympiads and other competitive exams, these solutions for biology class 10 how do organisms reproduce will be useful.
Also Check NCERT Books and NCERT Syllabus here:
- NCERT Books Class 10 Science
- NCERT Syllabus Class 10 Science
- NCERT Books Class 10
- NCERT Syllabus Class 10
Frequently Asked Question (FAQs) - NCERT Solutions for Class 10 Science Chapter 8 How do Organisms Reproduce?
Question: Explain the process of asexual reproduction covered in Chapter 8 of NCERT Solutions for Class 10 Science.
Answer:
Asexual reproduction belongs to lower animals. Their reproductive cells lack gametes. Genes maintain biological characteristics by being passed down from one generation to the next. It is recommended that students download the PDF of the solutions in order to fully comprehend the concepts covered in this chapter. With the intention of assisting students in performing well on the CBSE exams, a team of highly qualified subject matter experts has created the solutions.
Question: What is the weightage of NCERT Solutions for Class 10 Science Chapter 8?
Answer:
This chapter carries a weightage of 8-10 marks in the exam. To get more questions related to How do Organisms Reproduce refer to NCERT exemplar and CBSE previous year papers.
Question: Which kind of questions are asked from Chapter 8 of Class 10 Science?
Answer:
The following type of questions are asked from this chapter:
- Very short answer
- Short answers
- Long answers
- Practical based questions
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Questions related to CBSE Class 10th
my sons dob is 13/02/2009 is hi eligible for 10th board exam in 2024,,from cbse. olz reply me
The eligibility age criteria for class 10th CBSE is 14 years of age. Since your son will be 15 years of age in 2024, he will be eligible to give the exam.
Answer latercan Hindi marks be replace with IT 402(additional subject) in CBSE class 10th board
That totally depends on what you are aiming for. The replacement of marks of additional subjects and the main subject is not like you will get the marks of IT on your Hindi section. It runs like when you calculate your total percentage you have got, you can replace your lowest marks of the main subjects from the marks of the additional subject since CBSE schools goes for the best five marks for the calculation of final percentage of the students.
However, for the admission procedures in different schools after 10th, it depends on the schools to consider the percentage of main five subjects or the best five subjects to admit the student in their schools.
i got less marks in maths can it get replaced by additional hindi in cbse
Replacement of marks of additional subjects and your main course subject is not like they will swap the marks you got in Hindi and Mathematics on your marksheet. It works like if you calculate the total percentage you got in your class, you can take the marks of your additional subject to consider in place of the subject you have got the least marks in. CBSE schools consider this method only to release the merit list of their students.
If you're in 10th and aiming to get admission in 11th in any school, it depends on the schools if they consider your main five subject marks or the best five subject marks for the admission.
If you're in 12th and are trying for different colleges to get in, it depends on your course which you wish to study further and also some criterias and eligibility of the colleges. In most cases for general courses, colleges take the best three or best four subjects marks consideration for the admission process.
So, good luck.
when will cbse term 2 result will declare please tale
Hello,
Central Board of Secondary Education will declare term 2 CBSE exam result 2022 for Class 10 in the third week of July. Please keep an eye on the official website or the link below for the latest information. Students need to enter their CBSE board roll number and other details to check term 2 cbseresults.nic.in 2022 Class 10 results. The board had announced the CBSE Class 10 results 2022 for term 1 on March 11, 2022.
cbse 10 claas bord result check now
Hello Aspirant,
Class 10 cbse results are not out yet. It is expected to be declared on 23rd of July. Keep checking the official website of cbse.
Good luck.
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