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Reproduction class 12th /Importance of reproduction and basic features of reproduction .NEET/BIOLOGY CLASS 12th CBSE/NCERT 2024_2025 Important topics.

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Reproduction: It is a biological process in which an organism produces number of individuals or offsprings of  similar type. IMPORTANCE OF REPRODUCTION: 1) Continvity of species means group of individuals which are similar in morphology (external features) functions, behavior but they can reproduce sucessfully in natural condition. 2) It maintaines chromosome number. 3) It helps in replacement of organisms. BASIC FEATURES OF REPRODUCTION: Before reproduction these features are important. 1) Replication of DNA molecule means forming two or duplicate DNA copies. 2)Formation of RNA molecule, proteins, cells, cell organelles and other biochemicals. 3) Cell division [Mitosis_asexual/Meiosis_sexual]. 4) It helps in formation of separate reproductive units (Male/Female). 5) Formation of offsprings is due to combination of reproductive units. CELL DIVISION: It is the process by which a parent cell divides into two or more daughter cells .On the basis of cell division are two types of cell...
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What is Life (Biology) NEET 2024 CBSE CLASS 12th

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What is Life ? It is the ulimate question that has troubled us since the time immemorial. In fact, the answer of thisquestion is a philosophical one.  According to a scientist: Life is a unique, complex organisation of ions and molecules which perform certain chemical reactions in order to bring about life activities. In the living world, the organism as a whole is something more than the sum of its individual parts. That means, lite is not the property of any single part of an organism. It is the property of the organism as a whole. For example, we know the exact chemical composition of the protoplasm but we can not create it by simpiy putting together all the elements in a mixture in the right proportion and supplying it with energy.  mystery of life can be understood by comparing the living organisms with non-living matter.  What is "Living'? In order to have an understanding of living', we conventionally look for the characteristic  features exhibi...
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Why NaCl give s a white precipitate with AgNO³ solution but CCl⁴ does not?

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Q1.Why NaCl give s a white precipitate with AgNO³ solution but CCl⁴ does not? Ans. NaCl is an  ionic conpound and hence gives Cl‐ions in the solution which combine with Ag+ ions given by AgNO³ to fom a white precipitate of AgCl but CCl⁴ is a covalent compound and does not give Cl‐ions . Q2.Why reaction between NaCl and AgNO³  is very fast but reaction between H² and Cl² is slow? Ans. NaCl and AgNO³ are ionic compounds, In solution, NaCl gives Na+ and Cl_ ions and AgNO³, gives Ag+ and NO‐³ions. The oppositely charged Ag+and Cl+ ions combine immediately. The reaction betwecn H2 and Cl2 involves breaking of covalent bonds which requires energy.
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Cuet General Test 2023 Memory Based Questions?

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*Some Important Questions of Indian polity for General Test CUET & BA LLB Entrance* Q1.Who has the power to declare a state of emergency in India? Answer: The President of India has the power to declare a state of emergency in the country. Q2. Which article of the Indian Constitution deals with the Fundamental Rights? Answer: Article 12 to 32 of the Indian Constitution deal with the Fundamental Rights. Q3. Who is the head of the Indian Armed Forces? Answer: The President of India is the head of the Indian Armed Forces. Q4.Which is the oldest political party in India? Answer: The Indian National Congress is the oldest political party in the country. Q5. What is the term of a Member of Parliament (MP) in India? Answer: The term of a Member of Parliament (MP) in India is five years. For G.ene.ral Test.. Q6. What is the name of India's first satellite?   Answer: Aryabhata Q7. Which river is known as the 'Sorrow of Bihar'?  Answer: Kosi River Q8. What is the highest civil...
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Chemistry Paper                   Total Marks (65) SECTION _A                                         1each 1.Define Tetrahedral Void. 2.Colloids show...... motion. 3. Alcohols have: 4.Primary amines react with HNO² to give primary alcohol                              (True/False) 5.Give the IUPAC name of K³(Fe(CN)⁶]. 6. Which of the following Vitamins  is fat soluble? 1. Vitamin B complex 2.Vitamin D 3.Vitamin A 4.Vitamin E 7.Ketones have . 8.What is body centred cubic? 9. Silver mirror is a test for . 1.Aldehydes 2.Thioalcohols 3.Acids 4.Ethers 10. The disaccharide present in milk is. 1. Sucrose  2.Maltose  3.Lactose  4.Cellobiose. SECTION_B                            ...
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cuet general test questions with answers.

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 Some important questions for General Test (C.u.e.t) Q1. What is the name of the Indian Paraliament? Ans.The Indian Paraliament is known as the Sansad. Q2. What is the term of the President of India? Ans.The President of India is elected for a term of five years. Q3.Who is the Current Prime Minister of India? Ans. Narendra Modi. Q4.Which is the highest Court in India? Ans. The  Supreme Court of India is the highest court in the Country . Q5. What is the minimum age required to become the President of India? Ans. The minimum age required to become the President Of India is 35years. Q6.What is the national animal of India? Ans. Tiger  Q7. Who was the first  Prime Minister of India? Ans. Jawaharlal Nehru Q8.What is the Currency of India? Ans. Indian Rupee Q9.What is the national emblem of India? Ans. Ashoka Chakra Q10. Which city is known as the 'Pink City' of India? Ans. Jaipur
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Online Quiz competition by ansa jan

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1. How many red blood cells does  the bone marrow produce every second? A) 5million B) 7million C) 10million D) 12million 2. "RH" factor is a term that we hear in connection wiht? A) Space Travel B) Blood Transfusion C) Air Pressure D) Blood Pressure 3. The Branch of science which shows inter relationship offliving organisim and there environment? A) Ecology B)Genetics C) Anatomy D) Cell Biology 4.Which of the following is the causes Poliomyelitis?       ○ A) Dengue Virus       ○B)Enetrovirus       ○C)Mumpsvirus       ○D)Rhabdovirus. 5.Night binlders is cusead by the deficiency of             ○A)Vitamin A             ○B)ViatminB            ○C)VitaminC             ○D)VitaminD 6.Heavy alcohol consuming people generally dies of?     ...
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