The cell membrane acts as a selective barrier. It allows essential nutrients in, removes waste and protects internal structures. It maintains balance and supports communication between the cell and its environment. Class 8 Science Grade 8 Chapter 2 The Invisible Living ...
Category: Class 8 Science
NCERT Solutions and important questions for Class 8 science for CBSE 2020-2021.
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Both plant and animal cells contain a nucleus, cytoplasm and cell membrane. These three structures are essential for cell survival, functioning and communication in all living organisms. Class 8 Science Curiosity Chapter 2 The Invisible Living World: Beyond Our Naked Eye ...
Cheek cells are round or irregular, while onion cells are rectangular. Cheek cells lack a cell wall and chloroplasts, but onion cells have both, showing key plant vs. animal cell differences. Class 8 Science Curiosity Chapter 2 The Invisible Living World: ...
Human cheek cells appear irregular or oval-shaped under the microscope. Unlike rectangular plant cells, they lack cell walls and have a distinct central nucleus visible after staining. Class 8 Science Curiosity Chapter 2 The Invisible Living World: Beyond Our Naked Eye ...
Glycerin keeps cheek cells moist, prevents drying and improves visibility. It also holds the cover slip in place, ensuring a clear and stable view of the stained cells under the microscope. Class 8 Science Curiosity Chapter 2 The Invisible Living World: ...