Biology SL
Biology SL
4
Chapters
553
Notes
Theme A - Unity & Diversity
Theme A - Unity & Diversity
Theme B - Form & Function
Theme B - Form & Function
Theme C - Interaction &  Interdependence
Theme C - Interaction & Interdependence
Theme D - Continuity & Change
Theme D - Continuity & Change
IB Resources
Theme C - Interaction &  Interdependence
Biology SL
Biology SL

Theme C - Interaction & Interdependence

Unlock Plant Growth The Power of Auxin!

Word Count Emoji
463 words
Reading Time Emoji
3 mins read
Updated at Emoji
Last edited on 10th Nov 2023

Table of content

Introduction 🌱

Auxin is like a plant's personal trainer, helping it grow strong and in the right direction! Just as we need to stretch and work out our muscles, plant cells need to expand and elongate. And guess what? Auxin is the magic sauce that makes it happen.

Key Terms to Remember

  • Turgidity: It’s like when you fill a balloon with water. Plant cells puff up due to water pressure inside.
  • Cellulose microfibrils: Think of these as the plant's scaffolding. They're strong and don't stretch.
  • Apoplast: The space outside a cell's main body but within the cell wall.
  • Phototropism: That super cool phenomenon where plants grow towards light.

The Role of the Cell Wall 🌿

  • Acts as a plant’s armor – keeps the high water pressure inside so cells won’t burst.
  • Thanks to turgidity, shoots stand tall against gravity & wind. Imagine them as plant superheroes standing strong against evil forces!
  • Roots gain strength from turgidity – pushing through soil like a kid searching for hidden toys.

Building & Reinforcing the Cell Wall 🔨

  • Made of cellulose microfibrils (like strong threads).
  • Once growth finishes, add more threads for more strength.
  • Remember: These threads (microfibrils) don’t stretch. For growth, they slide around, making more space between them.

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IB Resources
Theme C - Interaction &  Interdependence
Biology SL
Biology SL

Theme C - Interaction & Interdependence

Unlock Plant Growth The Power of Auxin!

Word Count Emoji
463 words
Reading Time Emoji
3 mins read
Updated at Emoji
Last edited on 10th Nov 2023

Table of content

Introduction 🌱

Auxin is like a plant's personal trainer, helping it grow strong and in the right direction! Just as we need to stretch and work out our muscles, plant cells need to expand and elongate. And guess what? Auxin is the magic sauce that makes it happen.

Key Terms to Remember

  • Turgidity: It’s like when you fill a balloon with water. Plant cells puff up due to water pressure inside.
  • Cellulose microfibrils: Think of these as the plant's scaffolding. They're strong and don't stretch.
  • Apoplast: The space outside a cell's main body but within the cell wall.
  • Phototropism: That super cool phenomenon where plants grow towards light.

The Role of the Cell Wall 🌿

  • Acts as a plant’s armor – keeps the high water pressure inside so cells won’t burst.
  • Thanks to turgidity, shoots stand tall against gravity & wind. Imagine them as plant superheroes standing strong against evil forces!
  • Roots gain strength from turgidity – pushing through soil like a kid searching for hidden toys.

Building & Reinforcing the Cell Wall 🔨

  • Made of cellulose microfibrils (like strong threads).
  • Once growth finishes, add more threads for more strength.
  • Remember: These threads (microfibrils) don’t stretch. For growth, they slide around, making more space between them.

Unlock the Full Content! File Is Locked Emoji

Dive deeper and gain exclusive access to premium files of Biology SL. Subscribe now and get closer to that 45 🌟