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🧬 Chapter 3: The Cell – MCQs 1. Who discovered the cell? A) Louis Pasteur B) Robert Hooke C) Anton van Leeuwenhoek D) Schleiden ✅ Answer: B) Robert Hooke 2. The term 'cell' was derived from the Latin word “cellula” meaning: A) Water B) Small room C) Nucleus D) Tissue ✅ Answer: B) Small room 3. Which of the following is not a part of cell theory? A) All living things are made of cells B) Cells are the basic units of life C) All cells have a nucleus D) All cells come from pre-existing cells ✅ Answer: C) All cells have a nucleus 4. Which scientist proposed that all animals are made up of cells? A) Schleiden B) Schwann C) Virchow D) Hooke ✅ Answer: B) Schwann 5. The smallest living unit in an organism is: A) Organelle B) Tissue C) Cell D) Organ ✅ Answer: C) Cell 6. A typical cell has how many main parts? A) One B) Two C) Three D) Four ✅ Answer: C) Three (cell membrane, cytoplasm, nucleus) 7. Which cell organelle is called the 'powerh...

  50 (MCQs) for Chapter 2: Biodiversity   1. What is biodiversity? a) Study of ecosystems b) Variety of life on Earth c) Science of classification d) Only study of plants Sol: (b) Variety of life on Earth 2. Which branch of biology deals with classification of organisms? a) Morphology b) Ecology c) Taxonomy d) Genetics Sol: (c) Taxonomy 3. Who is known as the father of taxonomy? a) Charles Darwin b) Gregor Mendel c) Aristotle d) Carolus Linnaeus Sol: (d) Carolus Linnaeus 4. The system introduced by Linnaeus for naming organisms is called: a) Binary code b) Scientific naming c) Binomial nomenclature d) Biodiversity classification Sol: (c) Binomial nomenclature 5. In binomial nomenclature, the first part of the name represents: a) Species b) Order c) Family d) Genus Sol: (d) Genus 6. In binomial nomenclature, the second part represents: a) Class b) Phylum c) Species d) Kingdom Sol: (c) Species 7. The correct way to write the scientifi...

MCQs for Class 9 Biology 1. The word “biology” has been derived from two…………..words. a) Latin b) Greek c) English d) Scientific Sol: (b) Greek 2. In biology the word “bios” means……….. a) Life b) Logos c) Living things d) All of the above Sol: (a) Life 3. In biology the word “logos” means……… a) Thought b) Reasoning c) Thought or reasoning d) None Sol: (c) Thought or reasoning 4. The division of biology in which we study animals is called…… a) Botany b) Zoogeography c) Zoology d) Cell biology Sol: (c) Zoology 5. The division of biology in which we study plants is called…….. a) Botany b) Zoology c) Zoology and Botany d) Plant ecology Sol: (a) Botany 6. The study of tissues is called……… a) Anatomy b) Histology c) Physiology d) Entomology Sol: (b) Histology 7. The study of internal structures is called….. a) Anatomy b) Cell biology c) Genetics d) Biotechnology Sol: (a) Anatomy 8. The transmission of characters from one generation to the oth...

What Are Prokaryotes and Eukaryotes? In the vast and fascinating world of biology, one of the fundamental distinctions among living organisms is the type of cells they are made of. All living beings are composed of cells, but not all cells are the same. They are categorized into prokaryotic and eukaryotic cells — a classification that helps scientists understand the structure, function, and evolution of life on Earth. Let’s explore what prokaryotes and eukaryotes are, their differences, and why they matter. 🔬 What Are Prokaryotes? Prokaryotes are single-celled organisms that lack a true nucleus and membrane-bound organelles . The word "prokaryote" comes from Greek, where "pro" means before and "karyon" means nucleus — meaning "before nucleus." ✅ Key Characteristics of Prokaryotes: No nucleus : The DNA floats freely in the cytoplasm in a region called the nucleoid . No membrane-bound organelles : Structures like mitochondria, endoplasmic...

Understanding the Human Brain: Structure, Function, and Importance The human brain is one of the most complex and powerful organs in the human body. It governs every function, thought, emotion, and memory that defines our existence. Weighing approximately 1.3 to 1.4 kilograms, this organ might be small in size, but it contains more than 86 billion neurons—each forming thousands of connections known as synapses. In this comprehensive article, we will explore the structure, functions, and significance of the human brain, as well as its role in health and disease. Table of Contents Introduction to the Human Brain Anatomy of the Human Brain Major Parts of the Brain Brain Lobes and Their Functions Neurons and Neurotransmitters How the Brain Communicates Key Functions of the Human Brain Brain and Nervous System Disorders of the Brain Keeping the Brain Healthy Conclusion Frequently Asked Questions (FAQs) 1. Introduction to the Human Brain The huma...

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🌿 What is Chloroplast? – Structure, Function & Importance Explained Chloroplasts are one of the most essential organelles found in plant cells and some algae. These green structures play a key role in the process of photosynthesis, the method by which plants produce their own food. In this article, you’ll learn everything you need to know about chloroplasts—what they are, how they work, and why they matter in biology. 📘 Definition of Chloroplast A chloroplast is a double-membraned organelle found in plant cells and eukaryotic algae that conducts photosynthesis . It contains the green pigment chlorophyll , which captures light energy to convert carbon dioxide and water into glucose (sugar) and oxygen . 🧬 Structure of Chloroplast Chloroplasts have a complex internal structure that is vital for their function. Here's a breakdown: 1. Outer Membrane Smooth and permeable to small molecules. Acts as a protective covering. 2. Inner Membrane Less permeable and co...