Cell Differentiation: Animal vs Plant Cells Revision Notes | GCSE OCR Foundation Biology

What this lesson covers

Understand how animal cells differentiate early in development while plant cells retain the ability to differentiate throughout their lives, and explore...

• Explain why most animal cells differentiate early in development while plant cells retain this ability throughout life
• Compare the differentiation patterns between animal and plant cells
• Evaluate the importance of cell differentiation for multicellular organisms
• Apply knowledge of cell differentiation to explain how organisms develop specialised tissues

Key ideas to keep in view

Use this lesson to stay inside B2.1 Supplying the cell while connecting the detail back to the wider B2: Scaling up topic.

• B2: Scaling up
• B2.1 Supplying the cell
• GCSE OCR Foundation Biology

Lesson notes preview

Read the core explanations from Cell Differentiation: Animal vs Plant Cells before testing yourself from memory.

• Why can a plant regrow from a cutting, but you can't regrow your arm from a severed finger? The answer lies in one of biology's most fundamental processes: cell differentiation.
• Every multicellular organism starts as a single fertilised egg. That one cell must somehow become billions of specialised cells - heart cells that pump, nerve cells that transmit signals, and leaf cells that photosynthesise. But here's where it gets interesting: animals and plants take completely different approache...
• The process by which unspecialised cells become specialised to perform specific functions through changes in gene expression and cell structure.
• Trap: Many students think differentiation means cells gain new genes. Actually, all cells contain the same DNA - differentiation involves switching different genes on and off.
• Picture an animal embryo developing. In the first few days, cells divide rapidly and remain unspecialised - these are embryonic stem cells. But here's the crucial difference: most animal cells differentiate early and then lose the ability to change.
• Once an animal cell becomes a nerve cell, it stays a nerve cell for life. Once it becomes a muscle cell, that's its permanent identity. This early commitment explains why animals have limited regeneration abilities compared to plants.
• However, animals do retain some stem cells in specific locations - bone marrow, hair follicles, and the lining of the intestine. These adult stem cells can differentiate, but only into a limited range of cell types.
• Plants take a radically different approach. Many plant cells retain the ability to differentiate throughout the plant's entire life. This is why you can take a cutting from a plant and grow a whole new organism.
• Plant cells in regions called meristems remain unspecialised and continue dividing. But even some specialised plant cells can 'dedifferentiate' - reverse their specialisation and become stem cells again. This flexibility gives plants remarkable regenerative powers.
• Think about it: a single leaf cell from some plants can be cultured in a laboratory and grown into an entire new plant. Try doing that with a human skin cell - it won't work because animal cells have lost this flexibility.

Continue through the topic

Move to the related lessons or back to the topic page when you need the wider sequence before exam-style practice.