9th Class Biology

Biology 9th Model Paper Half Book For Students Practice

  Biology 9th                                                                   Objective Type Time Allowed:  15 minutes                                      Marks:  12 Note: You have four choices for each objective type question as A/B/C/ and D. The choice which you think is correct; fill that circle in front of that question number. Cutting or filling two or more circles will result in zero mark in that …

Biology 9th Model Paper Half Book For Students Practice Read More »

Important Definitions – 9th Class Biology

Important – Definitions   Chapter #1st     INTRODUCTION TO BIOLOGY   Science:Word science is derived from scientia means knowledge. Science is the study in which observations are made, experiments are done and logical conclusions are drawn in order to understand the principles of nature. “OR”The knowledge obtained through observations and experiments is called science. Biology: …

Important Definitions – 9th Class Biology Read More »

blood groups

Chapter 9 Transport – 9th Class Biology Free And Easy Notes

Question#1): What is the primary function of transport system? Answer:The primary function of transport system is to maintain a link between all cells of the body and the external environment. It transports the nutrients and water to the points where they are to be used.   Question#2) Describe the importance of water for plants and …

Chapter 9 Transport – 9th Class Biology Free And Easy Notes Read More »

Large intestine

Chapter 8 Nutrition – 9th Class Biology Notes

Question#1) Define the following terms? I) Nutrition. II) Nutrients. III) Autotrophs.  IV) Heterotrophs. Answer: I) Nutrition: The process in which food is obtained or prepared, absorbed and converted into body substances for growth and energy, is called nutrition. II) Nutrients: Nutrients are the elements and compounds that an organism obtains and uses for energy or …

Chapter 8 Nutrition – 9th Class Biology Notes Read More »

Chapter 6 Enzymes – 9th Class Biology Notes

Question#1) Write a short note on enzyme? Answer: Enzyme: Enzymes are proteins that catalyze (speed up) biochemical reactions by lowering its activation energy and are not changed during the reaction. All enzymes are catalysts but all catalysts are not enzymes. Only biocatalysts are called enzymes. Word enzyme was first used by a German physiologist kuhne …

Chapter 6 Enzymes – 9th Class Biology Notes Read More »

Cell Cycle

Chapter 5 Cell Cycle – 9th Class Biology Notes

Interesting information about this chapter and introduction;- All organisms consists of cells. An adult human being has approximately 1, 00,000 billion cells, all originate from a single cell, the fertilized egg cell or zygote. Cells arise from free existing cells as a result of cell division (cell reproduction) . Cells reproduce to produce new cells, …

Chapter 5 Cell Cycle – 9th Class Biology Notes Read More »

Bacterial Cell

Chapter 4 Cells and Tissues – 9th Class Biology Notes

Chapter # 4                                  CELLS AND TISSUES Question#1) Define Microscopy? What are different types of Microscope?   Answer:- Microscope; An optical instrument used for viewing very small objects, such as mineral samples or animal or plant cells, typically magnified several hundred times. Microscopy:- Microscopy is the use of microscope to observe minute living organisms.