Join 60,000+ competitive exam aspirants
or with email
Your Cart
SubtotalтВ╣0
TotalтВ╣0
Examoogle тАв User тАв info@examoogle.com тАв EE-2024-8821
Chapter 1 of 12 тАв Page 1 of 248ЁЯФТ Protected PDF тАв Watermarked
Join 60,000+ competitive exam aspirants
What are the basic building units of organisms?
Cells
Bones
Fibres
Tissues
Cells
Cells are the fundamental structural, functional, and biological units of all living organisms. Every living thing is made up of one or more cells, which is why cells are known as the basic building blocks of life.
Cells are the fundamental structural, functional, and biological units of all living organisms. Every living thing is made up of one or more cells, which is why cells are known as the basic building blocks of life.
Just as individual bricks are assembled to build a complete house, microscopic cells are the fundamental units assembled to build a living organism.
Remember 'C-T-O-S' for biological hierarchy: Cells тЖТ Tissues тЖТ Organs тЖТ Systems.
CellтЖТTissueтЖТOrganтЖТOrgan┬аSystemтЖТOrganism тАФ Structural hierarchy of life
In multicellular organisms, cells group together to form tissues, tissues combine to form organs, and organs work together to form organ systems. This hierarchical organization allows living organisms to perform complex metabolic functions, maintain homeostasis, and reproduce.
Cells are the basic structural and functional units of all known living organisms.
Robert Hooke discovered cells in 1665 using a primitive microscope.
Unicellular organisms consist of a single cell, whereas multicellular organisms consist of billions of specialized cells.
Cells contain genetic material (DNA) and carry out vital metabolic processes.
Cellular specialization allows multicellular organisms to perform complex and diverse functions efficiently.
Understanding diseases, genetics, and biotechnology (e.g., stem cell research, microbiology).
Option B (Bones) are skeletal organs made of connective tissue.
Option C (Fibres) are elongated thread-like structures found in muscles or plant tissues.
Option D (Tissues) are groups of cells, not the fundamental building unit itself.
A is correct тАФ Cells are the basic structural and functional units of all living organisms.
Always remember the biological hierarchy starting from cells up to the organism level, as questions frequently test the distinction between cells, tissues, and organs.
Get instant step-by-step AI explanations, full shift Previous Year Papers (SSC GD, RRB, SSC JE), and regional rank analysis on the official Examoogle App.
Free Download тАв 100K+ Aspirants