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class 11

NCERT Solutions for class 11 Biology CH – 17 Breathing And Exchange Of Gases

 Breathing And Exchange Of Gases 1. Define vital capacity. What is its significance?Solution: Vital capacity is defined as the maximum volume of air a person can breathe in after a forced expiration or the maximum volume of air a person can breathe out after a forced inspiration. It represents the maximum amount of air one can …

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NCERT Solution for Class 11 Biology CH- 16 Digestion And Absorption

 Digestion And Absorption 1. Choose the correct answer among the following:(a) Gastric juice contains(i) pepsin, lipase and rennin(ii) trypsin, lipase and rennin(iii) trypsin, pepsin and lipase(iv) trypsin, pepsin and rennin.(b) Succus entericus is the name given to(i) a junction between ileum and large intestine(ii) intestinal juice(iii) swelling in the gut(iv) appendix.Solution: (a) (i) Pepsin, lipase and …

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NCERT Solutions for Biology Ch -13 Photosyntesis In Higher Plants

 Photosyntesis In Higher Plants  1. By looking at a plant externally can you tell whether a plant is C3 or C4 ? Why and how? Solution: It is not possible to distinguish externally between a C3 and C4 plant, but generally tropical plants are adapted for C4  cycle. 2. By looking at which internal structure of a plant can you …

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NCERT Solutions for Biology Ch -12 Mineral Nutrition

 MINERAL NUTRITION 1.’All elements that are present in a plant need not be essential to its survival’. Comment. Solution. Most of the mineral elements present in the soil enter plants through roots but all of these may not be essential for their survival. Some are absorbed and accumulated by plant only because they are present in …

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NCERT Solution for Class 11 Biology Ch 4 – Animal kingdom

 Animal Kingdom 1.What are the difficulties that you would face in classification of animals, if common fundamental features are not taken into account?soln. The common fundamental features used for classifying animals include body symmetry, arrangement of cells, nature of coelom, level of organisation. Animal classification would be very confusing if fundamental features are not considered.(i)Animals having …

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NCERT solution for class 11 Biology Ch 12 – Mineral Nutrition

 Mineral Nutrition Class 11 Biology chapter 2 NCERT Solutions | Important NCERT questions for CBSE class 11 biology . Q1) ‘All elements that are present in a plant need not be essential to its survival’. Comment. Ans- Plants tend to absorb different kinds of nutrients from soil. However, a nutrient is inessential for a plant if it is not …

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NCERT Solutions for Class 11 Biology Chapter 2- Biological Classification

 Biological Classification Class 11 Biology chapter 2 NCERT Solutions | Important NCERT questions for CBSE class 11 biology . Q1) Discuss how classification systems have undergone several changes over a period of time? Ans- The classification systems have undergone several changes with time. The first attempt of classification was made by Aristotle. He classified plants as herbs, …

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Class 11 Geography Notes Chapter 2 The Origin and Evolution Of The Earth

The Origin and Evolution Of The Earth Starry nights have always attracted us since childhood. You may also have thought of these stars and had numerous questions in your mind. Questions such as how many stars are there in the sky? How did they come into existence? Can one reach the end of the sky? …

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