Chapter 8 Nutrition – 9th Class Biology Notes

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 …

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Chapter 6 Enzymes 9th Class Biology Notes

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 …

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Chapter 5 Cell Cycle – 9th Class Biology Notes

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 …

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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 …

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Chapter 3 Biodiversity 9th Class Biology Notes

Biodiversity 9th Class Biodiversity 9th Class Notes Chapter  Number 3 Complete Notes Question#1) Define Biodiversity? Answer: Biodiversity: The term “biodiversity” has been derived from ‘bio’ and ‘diversity’.  Biodiversity is a measure of the variety of organisms present in different ecosystems or earth surface. Flora: Diversity of plants in an ecosystem is called flora. Fauna: Diversity …

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Is there any division of labour among the cells of a colony

Is there any division of labour among the cells of a colony? If you find division of labour among the cells and tissue what level of cellular organization is it? Answer: Colonial organization do not have any division of labour. Division of labour is at organelle level in unicellular organization . Division of labour is …

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