EducatorSharmin

                                  Bioenergetics            Biology for 9 & 10 Chapter - 4 Q.1. What is photosynthesis? Represent it by a chemical equation. Ans: Green plants produce carbohydrates from carbon dioxide and water in the presence of sunlight. This process is called photosynthesis. Photosynthasis is a biochemical reaction shown below:      Energy is required to maintain the process of life of organisms, for activities like locomotion, healing of injury, growth and reproduction. The main source of energy is the sun. Through photosynthesis, plants store solar energy in carbohydrates as potential energy. During respiration, this potential energy is converted into kinetic energy (ATP) in the form of heat, which supplies the necessary energy for various physiological activities. Q.2. What are the raw materials for photosynthesis? Q.3. What is respir...

  Cell Division   Biology  CELL DIVISION: Biology for 9 & 10 Chapter - 3 Q. 1. What is cell division? Ans: Every living body is made up of of a cell or cells. The life of every organism starts with a single cell. After the fertilization of an egg, the structure of a human is achieved with crores of cells dividing through the process of cell division. 2. What is equational cell division? Ans: In mitosis cell division, chromosome number of mother cell and daughter cell remains equal. Qualitative features of the chromosome of mother cell is transferred to the daughter chromosome without any change. Again the size and shape of the daughter cell is just like the mother cell. For such reason, mitosis cell division is called equational cell division. 3. Describe the different stages of mitosis with labeled diagrams. Ans:  Mitosis is a continuous process. It can be divided into five stages. They are- a) Prophase: This is the first stage of mitosis. At the onset of t...

Healthy Lifestyle Q/A Grade- 3 Q. 1. What should you do after using toilets? Ans: We should wash hands with clean water and soap after using toilets. Q.2. How can we prevent diseases? Ans: We can prevent diseases in the following ways- a) Washing hands b) Using safe water c) Cleaning environment d)  To eat balanced diet  Q.3. Why do we need a clean environment to stay healthy? Ans: We need a clean environment to reduce the spread of germs.     Q.3. Short Answered Questions: a) What are the sources of vitamin C? Ans: The sources of vitamin C are fruits such as guava, oranges, lemons, vegetables like tomatoes, cabbage and broccoli etc. b) What are the function of vitamin A? Ans: The function of Vitamin A are- a) helps for proper vision b) healthy skin, strong teeth  c) healthy immune system. c) Name 3 diseases caused by lack of vitamins. Ans: lack of vitamins may cause different types of diseases such as night blindness, mouth ulcer, rickets. d) What is vitamin B ...

Area & Perimeter of Trapezium * A quadrilateral having one pair of parallel sides is called a trapezium . * A figure surrounded by 4 straight lines is called a quadrilateral. * A line segment joining two opposite pairs of vertices is called a diagonal . A quadrilateral has two diagonals, but a triangle does not have any diagonal. * A trapezium is a quadrilateral in which one pair of opposite sides are parallel to each other.                  Q.1. Finding Area and Perimeter of a Trapezium)                                                   The figure shows a trapezium ABCD where                                                                  ...