JKBOSE Class 9th Biology | Life Science Notes PDF Download
JKBOSE Class 9th Biology Notes PDF Download
JKBOSE Class 9th Biology Notes PDF Download. Get the important of Class 9th for the subject Chemistry. All the Units of this subject is discussed below unitwise. You can choose the unit below that you want. In this article you will get complate JKBOSE Class 9th Chemistry Notes with PDF Download.
Download Unitwise JKBOSE Class 9th Biology Notes
| Unit 1: The Fundamental Unit of Life |
| Unit 2: Tissues |
| Unit 3: Diversity in Living organisms |
| Unit 4: Why do we fall ill |
| Unit 5: Natural Resources |
| Unit 6: Improvement in Food Resources |
| Unit 7: Prevention of Drug Abuse and Sexually Transmitted Diseases |
Important Questions of JKBOSE Class 9th Biology
Q1. What is biology?
Ans: Biology is the academic study of living things and how they interact with their surroundings. It covers a wide range of subjects, ranging from the tiniest cellular building blocks to complete ecosystems.
Q2. Why is the cell considered the fundamental unit of life?
Ans: All biological things are composed of basic structural and functional units called cells. They perform vital life-sustaining functions include acquiring energy, growing, and reproducing. Knowing how cells work is essential to understanding how intricate living things are.
Q3. How do genes influence inherited traits?
Ans: DNA segments known as genes are blueprints for creating and caring for living things. By encoding particular proteins or regulating their expression during development, they produce features that are inherited.
Q4. What is evolution, and how does it work?
Ans: Evolution is the process by which a species gradually changes over time. Natural selection causes it when individuals with desirable qualities live longer, reproduce more frequently, and pass those traits on to subsequent generations.
Q5. How do living organisms interact with their environment?
Ans: Ecological interactions are the means by which living things communicate with their surroundings. Symbiosis, rivalry for resources, and predator-prey relationships are examples of these interactions.
Q6. What is photosynthesis, and why is it essential for life on Earth?
Ans: Photosynthesis is the process through which plants, algae, and some bacteria produce glucose (energy) and oxygen from sunlight, carbon dioxide, and water. It is essential because it establishes the base of the food chain and contributes to the atmospheric oxygen supply.
Q7. How does the human circulatory system work?
Ans: The body's circulatory system moves blood and nutrients all throughout it. It is made up of blood, blood arteries, and the heart. Deoxygenated blood is pumped to the lungs for oxygen exchange while oxygenated blood is sent to body tissues by the heart.
Q8. What are microorganisms, and how can they cause diseases?
Ans: Microorganisms, which include bacteria, viruses, and fungi, are teeny, living things. Some bacteria can infect the body and interfere with its regular processes, which can result in diseases.
Q9. How do scientists classify living organisms?
Ans: Taxonomy is a system used by scientists to categorise together living things into hierarchical categories based on shared traits. Domains, kingdoms, phyla, classes, orders, families, genera, and species are included in the classification.
Q10. How are biotechnology and genetic engineering related?
Ans: Utilising biological processes and organisms to create new products and technologies is known as biotechnology. In the specialised branch of biotechnology known as "genetic engineering," an organism's DNA is altered in order to produce useful proteins or change features.
Q11. What are the different methods of reproduction in living organisms?
Ans: Both sexual and asexual reproduction are processes used by living things. Asexual reproduction involves the development of children from a single parent without gamete fusion, whereas sexual reproduction entails the fusion of gametes from two parents.
