Скачать или смотреть Levels of Organization | Biology Class 9 - Chapter 5 | Lecture 1 | Class 9th Biology New Book 2025

Levels of Organization | Biology Class 9 - Chapter 5 | Lecture 1 | Class 9th Biology New Book 2025

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In this video, we will cover these topics.

Levels of Organization:"Organisms are built on a hierarchy of organization. From the simplest atom to the most complex organism, each level builds upon the previous one to create life."

Atom(The Smallest Unit):"Atoms are the smallest units of matter that retain the properties of an element.
Examples include carbon, hydrogen, and oxygen."

Molecule (Combination of Atoms):"When atoms combine, they form molecules.
Molecules can have completely different properties than the atoms that make them. Examples are water, proteins, and nucleic acids."

Organelle:"Molecules assemble in specific ways to form organelles. Each organelle performs a specialized function.
For example, mitochondria carry out cellular respiration, while ribosomes synthesize proteins."

Cell – Basic Unit of Life:"Cells are formed when organelles interact with each other. A cell is the smallest unit of life, capable of carrying out all life processes.
Unicellular organisms have only one cell, while multicellular organisms have many."

Tissue – Group of Similar Cells:In multicellular organisms, similar cells work together to form tissues that perform specific functions.

Organ (Collection of Tissues):An organ is made of different tissues working together for a specific function.

Organ System (Group of Organs):An organ system is made of multiple organs working together to perform related functions.

Emergent Properties:In organisms, each level of organization does not work alone.
Instead, components interact with one another to create new abilities called emergent properties.
As Aristotle said: The whole is greater than the sum of its parts.

1.From Organelles to Cells.
2.From Cells to Tissues.
3.From Organs to Organ Systems.
4.From Organ Systems to Organism.

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