NCERT Solutions Class 11 Biology Chapter 22 Chemical Coordination and Integration

Question. Define the following: (a) Exocrine gland (b) Endocrine gland (c) Hormone Answer Answer  (a) Exocrine gland: Glands that discharge their secretions into ducts are known as exocrine glands. (b) Endocrine gland: Glands that do not discharge their secretions into…

NCERT Solutions Class 11 Biology Chapter 21 Neural Control and Coordination

Question. Briefly describe the structure of the following: (a) Brain (b) Eye (c) Ear Answer (a) Brain: The human brain is well protected by the skull. Inside the skull, the brain is covered by cranial meninges consisting of an outer layer called dura mater, a very thin middle…

NCERT Solutions Class 11 Biology Chapter 20 Locomotion and Movement

Question. Draw the diagram of a sarcomere of skeletal muscle showing different regions. Answer         Question. Define sliding filament theory of muscle contraction. Answer Sliding filament theory of muscle contraction states that contraction of…

NCERT Solutions Class 11 Biology Chapter 19 Excretory Products and their Elimination

Question. Define Glomerular Filtration Rate (GFR) Answer The amount of the filtrate formed by the kidneys per minute is called glomerular filtration rate (GFR). Question. Explain the autoregulatory mechanism of GFR. Answer The kidneys have built-in mechanisms for the…

NCERT Solutions Class 11 Biology Chapter 18 Body Fluids and Circulation

Question. Name the components of the formed elements in the blood and mention one major function of each of them. Answer The components of the formed elements in the blood with their major function are: -- Erythrocytes (RBC): The erythrocytes play a significant role in…

NCERT Solutions Class 11 Biology Chapter 17 Breathing and Exchange Of Gases

Question. Define vital capacity. What is its significance? Answer The maximum volume of air a person can breathe in after a forced expiration is called vital capacity. It helps in finding differentiate causes of lung disease. Question.State the volume of air remaining in the…

NCERT Solutions Class 11 Biology Chapter 16 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 renin Answer: (i) pepsin, lipase and rennin (b) Succus entericus is the…

NCERT Solutions Class 11 Biology Chapter 15 Plant Growth and Development

Question. Define growth, differentiation, development, dedifferentiation, redifferentiation, determinate growth, meristem and growth rate. Answer • Growth is an irreversible permanent increase in size of an organ or its parts or even of an individual cell. • Differentiation is…

NCERT Solutions Class 11 Biology Chapter 14 Respiration in Plants

NCERT Solutions for Class 11 Biology for Chapter 14 Respiration in Plants 1. Differentiate between (a) Respiration and Combustion (b) Glycolysis and Krebs’ cycle (c) Aerobic respiration and Fermentation F Answer: (a)   Respiration Combustion 1. It occurs within …

NCERT Solutions Class 11 Biology Chapter 13 Photosynthesis in Higher Plants

NCERT Solutions for Class 11 Biology for Chapter 13 Photosynthesis in Higher Plants 1. By looking at a plant externally can you tell whether a plant is C3 or C4? Why and how? Answer: No, one cannot tell whether a plant is C3 or C4 by looking at only external features. There is…

NCERT Solutions Class 11 Biology Chapter 12 Mineral Nutrition

NCERT Solutions for Class 11 Biology for Chapter 12 Mineral Nutrition 1. ‘All the elements that are present in a plant need not be essential to its survival.’ Comm Answer: The statement that “all the elements that are present in a plant need not be essential to its survival”…

NCERT Solutions Class 11 Biology Chapter 11 Transport in Plants

NCERT Solutions for Class 11 Biology for Chapter 11 Transport in Plants 1. What are the factors affecting the rate of diffusion? Answer: Diffusion is a process of passive (ATP/energy is not required) movement of solutes from one place (lower concentration) to another (higher…

NCERT Solutions Class 11 Biology Chapter 10 Cell Cycle and Cell Division

NCERT Solutions for Class 11 Biology for Chapter 10 Cell Cycle and Cell Division 1. What is the average cell cycle span for a mammalian cell? Answer: The average cell cycle span for a typical mammalian cell is about 24 hours. These cells divide once in every 24 hours to form…

NCERT Solutions Class 11 Biology Chapter 9 Biomolecules

NCERT Solutions for Class 11 Biology for Chapter 9 Biomolecules 1.What are macromolecules? Give examples. Answer: A macromolecule is a very large molecule of relatively high molecular weight (of more than one thousand daltons) which is created by polymerization of smaller…

NCERT Solutions Class 11 Biology Chapter 8 Cell The Unit of Life

NCERT Solutions for Class 11 Biology for Chapter 8 Cell The Unit of Life 1. Which of the following is not correct? (a) Robert Brown discovered the cell Answer: Incorrect Robert Brown did not discover the cell. It was Robert Hooke who first discovered the cell in 1665. (b)…