Class 10 Biology Viva Voce Questions and Answers for CBSE Board 2020-21 - Future Study Point

Class 10 Biology Viva Voce Questions and Answers for CBSE Board 2020-21

biology viva voce

Class 10 Biology Viva Voce Questions and Answers for CBSE Board

biology viva voce


Here, all answers to Viva Voce questions of class 10 biology are presented by future study points for the purpose of motivating you to enhance your knowledge and interest in biology subject. The study of these Viva Voce questions of class 10 biology will help you to boost up your preparation for the CBSE board exam of 2020-21. All  Viva Voce questions of biology of class 10 are answered by a subject expert as per the CBSE norms. The set of questions and answers are also useful for the preparation of all kinds of competitive entrance exams also.

All answers to Viva Voce questions of class 10 biology are created here will help class 10 students as well as the candidates who are going to appear in competitive entrance exams. These Viva Voce questions are taken from the CBSE Science manual books ,the questions and anwers mentioned here are as per the CBSE norms.

NCERT Solutions Class 10 Science from chapter 1 to 16

Q1.What is the function of guard cells in stomata?

Ans. The guard cells regulate/control the opening and closing of stomata.

Q2.Why are stomata absent in roots.

Ans. As a little gas exchange takes place in roots hence stomata are not present in them.

Q3.Each stoma is surrounded by two bean-shaped cells. What are they called?

Ans. They are called guard cells.

Q4.Which surface of dicot leaves more stomata are present?

Ans.On the lower surface of leaves i.e lower epidermis.

Q5.What is transpiration?

Ans. The loss of water in the form of vapours from the surface of leaves is called transpiration.

Q6. How will one identify monocot leave and a dicote leave on the basis of stomata?

Ans. Guard on the monocot leaves are dumb-bell shaped while in dicot leaves they are kidney-shaped or bean-shaped.

Q7.Which side of leaves should be observed for stomata in dicot plants?

Ans. Stomata is present in both sides of the dicot leaf.

Q8.What are the function of the stomatal apparatus?

Ans. The function of the stomata are:

(a) For the exchange of gases during respiration and photosynthesis.

(b) During transpiration for loss of water.

Q9. Do the guard cells have rigid or elastic walls? Justify your answers.

Ans. Guard cells have thicker cell walls on inner side than the outer side. This adds to their flexibility while opening and closing.

Q10.Define venation.

Ans. The pattern of veins in a leaf lamina is called venation. Some plants monocots have parallel venation and others (dicots) have network type venation(reticulate).

Q11. State the difference between photosynthesis and respiration.


Difference between respiration and photosynthesis

Q12. What do you mean by a catabolic process?

Ans. Catabolism means the metabolic activities which involve breakdown of complex substances like glucose in cells is broken simpler substances(H2O & CO2).

Q13.Define breathing.

Ans. The physical process of inhalation of oxygen and exhalation of carbon dioxide is called breathing.

Q14.Define fermentation.

Ans.It is a type of anaerobic respiration. It also releases CO2 as a by-product.

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Q15. Why we use germinating seeds but not green leaves of a plant to demonstrate respiration.

Ans. Germinating seeds are under rapid growth hence they actively respire. On the other hand, green leaves of a plant will undergo photosynthesis also along with respiration. Thus it will utilize CO2 produced during respiration, hence the presence of CO2 may not be detected properly.

Q16. What is the role of KOH in this experiment?

Ans.KOH absorbs the CO2 produced thus creating a partial vacuum in the flask.

Q17.Why germinating seeds are moistened so that they don’t dry up and continue respiration with the help of moisture.

Ans. The seeds are moistened so that they don’t dry up and continue respiration with the help of moisture.

Q18.What are raw materials for respiration?

Ans. Sugars and oxygen.

Q19.Write the chemical reaction introduced in respiration.


Q20. What is the full form of ATP.

Ans. Adenosine Triphosphate, it is an energy-rich molecule.

Q21. What is asexual reproduction?

Ans. It is a mode of reproduction in which a single organism produces new organisms without the formation of ay special cell(gamete). A single parent produces two or more individuals.

Q22.Define fission and type of fissions.

Ans. A mode of reproduction when an organism divides into two or more off sprigs. The parent organism splits into two or more off sprigs. The parent organism splits into two or more parts. Fission is of two types.

(a) Binary fission: Organism divides into two daughter cells.

(b) Multiple fission: Organism divides into two or more than two individuals.

Q23.Name an organism which divides by multiple fission,

Ans. Plasmodium (Malaria parasite)

Q24.How many fissions occurs in Amoeba?

Ans. A mature cell of amoeba undergoes karyokinesis(i.e division of nucleus first followed by cytokinesis (i.e division of the cytoplasm) resulting in the formation of two daughter cells. The parent amoeba cell loses its identity in such division.

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Q25.What is vegetative propagation?

Ans. Growing of plants from vegetative parts of it like leaf, root, or stem is known as vegetative propagation. It is an asexual mode of reproduction.

Q26. Is budding in yeast different from hydra? Justify your answer.

Ans. In yeast, budding occurs in the form of a protuberance on the parent yeast cell. It may separate or may not separate and can further develop into several daughter buds. In hydra, the bud separates due to repeated mitotic cell division and is a multicellular single organism itself.

Q27.Which type of cell division involved in binary fission?

Ans. Mitosis, as the number of chromosomes, remains the same.

Q28. Mention the points of differences between sexual ad asexual reproduction.


asexual and sexual reproduction

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NCERT Solutions of Science and Maths for Class 9,10,11 and 12

NCERT Solutions for class 9 maths

Chapter 1- Number SystemChapter 9-Areas of parallelogram and triangles
Chapter 2-PolynomialChapter 10-Circles
Chapter 3- Coordinate GeometryChapter 11-Construction
Chapter 4- Linear equations in two variablesChapter 12-Heron’s Formula
Chapter 5- Introduction to Euclid’s GeometryChapter 13-Surface Areas and Volumes
Chapter 6-Lines and AnglesChapter 14-Statistics
Chapter 7-TrianglesChapter 15-Probability
Chapter 8- Quadrilateral

NCERT Solutions for class 9 science 

Chapter 1-Matter in our surroundingsChapter 9- Force and laws of motion
Chapter 2-Is matter around us pure?Chapter 10- Gravitation
Chapter3- Atoms and MoleculesChapter 11- Work and Energy
Chapter 4-Structure of the AtomChapter 12- Sound
Chapter 5-Fundamental unit of lifeChapter 13-Why do we fall ill ?
Chapter 6- TissuesChapter 14- Natural Resources
Chapter 7- Diversity in living organismChapter 15-Improvement in food resources
Chapter 8- MotionLast years question papers & sample papers

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NCERT Solutions for class 10 maths

Chapter 1-Real numberChapter 9-Some application of Trigonometry
Chapter 2-PolynomialChapter 10-Circles
Chapter 3-Linear equationsChapter 11- Construction
Chapter 4- Quadratic equationsChapter 12-Area related to circle
Chapter 5-Arithmetic ProgressionChapter 13-Surface areas and Volume
Chapter 6-TriangleChapter 14-Statistics
Chapter 7- Co-ordinate geometryChapter 15-Probability
Chapter 8-Trigonometry

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NCERT Solutions for Class 10 Science

Chapter 1- Chemical reactions and equationsChapter 9- Heredity and Evolution
Chapter 2- Acid, Base and SaltChapter 10- Light reflection and refraction
Chapter 3- Metals and Non-MetalsChapter 11- Human eye and colorful world
Chapter 4- Carbon and its CompoundsChapter 12- Electricity
Chapter 5-Periodic classification of elementsChapter 13-Magnetic effect of electric current
Chapter 6- Life ProcessChapter 14-Sources of Energy
Chapter 7-Control and CoordinationChapter 15-Environment
Chapter 8- How do organisms reproduce?Chapter 16-Management of Natural Resources

NCERT Solutions for class 11 maths

Chapter 1-SetsChapter 9-Sequences and Series
Chapter 2- Relations and functionsChapter 10- Straight Lines
Chapter 3- TrigonometryChapter 11-Conic Sections
Chapter 4-Principle of mathematical inductionChapter 12-Introduction to three Dimensional Geometry
Chapter 5-Complex numbersChapter 13- Limits and Derivatives
Chapter 6- Linear InequalitiesChapter 14-Mathematical Reasoning
Chapter 7- Permutations and CombinationsChapter 15- Statistics
Chapter 8- Binomial Theorem Chapter 16- Probability

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NCERT solutions for class 12 maths

Chapter 1-Relations and FunctionsChapter 9-Differential Equations
Chapter 2-Inverse Trigonometric FunctionsChapter 10-Vector Algebra
Chapter 3-MatricesChapter 11 – Three Dimensional Geometry
Chapter 4-DeterminantsChapter 12-Linear Programming
Chapter 5- Continuity and DifferentiabilityChapter 13-Probability
Chapter 6- Application of DerivationCBSE Class 12- Question paper of maths 2021 with solutions
Chapter 7- Integrals
Chapter 8-Application of Integrals


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