Biology HL
Biology HL
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 A - Unity & diversity
Biology HL
Biology HL

Theme A - Unity & diversity

Unusual Cell Structures in Eukaryotes

Word Count Emoji
429 words
Reading Time Emoji
3 mins read
Updated at Emoji
Last edited on 14th Jun 2024

Table of content

Hey future biologists! Get ready to dive into the fascinating world of cells, but not just any cells – the odd ones out! Let's have fun exploring these wild structures and even meet a few 'celebrity' examples!

Introduction - breaking the rules 🦠

  • Cell Theory Basics: Cells are the building blocks of life. Usually, there's one nucleus, except when a cell is dividing (then there might be two). But surprise! Some cells don't play by these rules.
  • Real-world Example: Think of cells as rooms in a house, and the nucleus as the main control center. Now, imagine a room without a control center or even with multiple ones. Weird, huh? Let's find out why!

Red blood cells - the super flexible travelers 🩸

  • What's Missing?: Nucleus! It's kicked out during development.
  • Why?: To make the cells smaller and flexible, like a car losing its backseat for extra trunk space.
  • Consequence: They can't repair themselves, like a toy without a repair manual, so they only last 100 to 120 days.

Phloem sieve tube elements - the plant's sugar highway 🌱

  • What's Unique?: No nucleus and a 'sieve-like' structure between cells.
  • Why?: To let sugary sap flow easily, like removing traffic lights from a highway.
  • Buddies: Companion cells (with nuclei) help these oddball cells to function.
  • Note: Xylem, another part of the plant, creates hollow tubes by destroying cell contents. Both structures ensure a smooth flow, like different lanes on a freeway.

Unlock the Full Content! File Is Locked Emoji

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

Nail IB's App Icon
IB Resources
Theme A - Unity & diversity
Biology HL
Biology HL

Theme A - Unity & diversity

Unusual Cell Structures in Eukaryotes

Word Count Emoji
429 words
Reading Time Emoji
3 mins read
Updated at Emoji
Last edited on 14th Jun 2024

Table of content

Hey future biologists! Get ready to dive into the fascinating world of cells, but not just any cells – the odd ones out! Let's have fun exploring these wild structures and even meet a few 'celebrity' examples!

Introduction - breaking the rules 🦠

  • Cell Theory Basics: Cells are the building blocks of life. Usually, there's one nucleus, except when a cell is dividing (then there might be two). But surprise! Some cells don't play by these rules.
  • Real-world Example: Think of cells as rooms in a house, and the nucleus as the main control center. Now, imagine a room without a control center or even with multiple ones. Weird, huh? Let's find out why!

Red blood cells - the super flexible travelers 🩸

  • What's Missing?: Nucleus! It's kicked out during development.
  • Why?: To make the cells smaller and flexible, like a car losing its backseat for extra trunk space.
  • Consequence: They can't repair themselves, like a toy without a repair manual, so they only last 100 to 120 days.

Phloem sieve tube elements - the plant's sugar highway 🌱

  • What's Unique?: No nucleus and a 'sieve-like' structure between cells.
  • Why?: To let sugary sap flow easily, like removing traffic lights from a highway.
  • Buddies: Companion cells (with nuclei) help these oddball cells to function.
  • Note: Xylem, another part of the plant, creates hollow tubes by destroying cell contents. Both structures ensure a smooth flow, like different lanes on a freeway.

Unlock the Full Content! File Is Locked Emoji

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