IX CBSE Science Test Paper And Study Materials

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Obtaining and Utilization Food Class 7 Science Solved question (Basic Science Questions answers)

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A. Answer these questions 1. Name the three life process help living being to procure energy from food? Answer: Three life processes that help living organisms to procure energy from food are: (i) Digestion (Nutrition) (ii) Respiration (iii) Transportation 2. What are Autotrophs? Name an organism other than other than green plant that is an autotroph. Answer: Autotrophs are organisms that can prepare their own food. Chlamydomonas is a type of green algae which is an example of an autotroph, other than green plants. Cyanobacteria are also an example of autotroph. 3. Name three type of heterotrophic nutrition Answer: Three types of heterotrophic nutrition are: (i) Saprophytic nutrition (ii) Parasitic nutrition (iii) Holozoic nutrition 4. What are enzymes? Answer: Enzymes are chemical substances that act as biological catalysts and are important for carrying out biochemical processes, such as digestion, in our body
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Plants fiber and fabric solution Cordova Learning Science class07

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A Tick the correct options: 1. Which of the following is not a natural fibre? (a) cotton (b) rayon √ (c) silk (d) wool 2. Lohi is the breed of (a) cow (b) silk moth (c) sheep √ (d) buffalo 4. Sheep are sheared in season (a) summer √ (b) spring (c) autumn Ö (d) winter 3. How many weeks are required for the eggs of silk moth to hatch? See book (a) one (b) two √ (c) three (d) four 6. Which of the following silk is produced when raw silk is twisted? (a) spun (b) coloured (c) thrown √ (d) mooga 5. What do we call the silky covering spun by the silkworm for its protection? (a) moth (b) larvae (c) pupa (d) cocoon√ B. Fill in the blanks: 1. Alpaca is generally f
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Class9 Biology chapter Cell the Fundamental unit of life :Assignment solved

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1. What is plasma membrane? What are their functions? Ans: Plasma membrane also called as cell membrane, is the outer covering of a cell that separates the cell contents (protoplasm) from the surrounding medium. It is made up of proteins and lipids. It gives form (shape and size) to the cell It maintains the individuality of the cell (i.e. seperates cells) It keeps the cell contents in place 2. What are cell organelles ? Ans: The certain specific living parts of a cell with a definite function are celled Cell organelles. All cell are found to have same organelles and together these constitute to the basic unit of life. 3. What is cellulose and its functions? Ans: Cellulose is the main component of a plant cell wall. It is responsible for giving structural shape to the cell and also to protect the protoplasm. 4.  What is a Prokaryotic cell? Give an Example. Ans: The cells that do not have a nuclear membrane and membrane
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10th Maths Quadratic Equation Worksheet For CBSE Students]

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Central Public School,Samastipur And Sadhana Devi Vidyapith, Samastipur [Student Practice] Quadratic Equations  : Contents 1. Standard form of a quad. Equations:  ax 2 + bx + c = 0 (a ≠ 0) 2. Solution of the quadratic equations only real roots by  (a) Factorization           (b) Completing the square                 (c) Quadratic formula 3. Relationship between discriminant and nature of roots. if D > 0 => Real & Distinct Roots          if D = 0 => Real & Equal Roots        if D < 0 => No Real Roots 4. Problems related to day to day activities Learning Objective: To learn the following facts 1. A second degree Equation of the form ax 2 + bx + c = 0 where a, b, c are real numbers and a ≠ 0 are called quadratic eqn. 2. If ax 2 + bx + c = 0 equivalent to (x – a) (x – b) = 0 then x = a and x = b is a solution. 3. If ax 2 + bx + c = 0 has a & b as roots of eqn then sum of roots = – b/a. Product of roots = c/a. 4. (b 2 – 4ac)
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HEREDITY AND EVOLUTION SOLVED EXERCISES QUESTIONS [Biology Term-2 CHAPTER - 13]

Q.1. What is heredity? Ans:- Heredity refers to the transmission of characters or traits from the parents to their offspring. Q.2. Name the plant on which Mendel performed his experiments? Ans:- Garden Pea ( Pisum sativum .) Q.3. Define variation? Ans:-Variation refers to the differences in the characters or traits about the individuals of a species. Q.4. Define a gene? Ans:- Gene is a small segment of DNA on a chromosome occupying specific position in which is a hereditary determinant or unit of a biological function. Q.5.Write the expanded form of DNA? Ans:- DNA - Deoxyribonucleic Acid. Q.6. What are the components of chromosome? Ans:- Each chromosome is double or replicated and consists of two thread like structures called chromatids attached to each other at centromere. .Each chromatid has a number of dense areas arranged linearly which are known as chromomeres. They represent the areas of active genes. .Internally each chromosome has two spirally coiled
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