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 B - Form & Function
Biology HL
Biology HL

Theme B - Form & Function

Unlocking Protists Mixotrophic Nutrition's Dual Power

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

Table of content

The food spectrum - where do you stand? 🌈

  • Autotrophs: The DIY experts! 🌱 They make their own carbon compounds from basics like carbon dioxide.

    • Real-world example: Plants in your backyard making their food via photosynthesis.
  • Heterotrophs: The foodies! 🍔 They depend on others and obtain their carbon compounds from different organisms.

    • Real-world example: Humans munching on a sandwich.
  • Mixotrophs: The best of both worlds! 🌱🍔 They're neither strictly DIY experts nor just foodies. They use both methods of getting their nutrition.

Types of mixotrophs - because variety is the spice of life 🌍

  • Facultative Mixotrophs: The flexible ones! 🤸

    • Can be 100% DIY, 100% foodie, or sometimes both!
    • Star Performer: Euglena gracilis 🌟
      • Has chloroplasts and enjoys sunbathing to do photosynthesis when it’s sunny.
      • But on a cloudy day? It might just snack on some debris or tiny organisms by wrapping them up (a process called endocytosis).
  • Obligate Mixotrophs: The multitaskers who can’t pick sides! 🌱🍔

    • They NEED both DIY and foodie methods to grow.
    • Why? Some might need a special carbon compound from their food which they can't make on their own.
    • Some cheeky protists without chloroplasts steal them from algae, sort of like "borrowing" a friend’s homework. These borrowed chloroplasts, called “klepto-chloroplasts,” help them do photosynthesis till they wear out and need replacing.

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IB Resources
Theme B - Form & Function
Biology HL
Biology HL

Theme B - Form & Function

Unlocking Protists Mixotrophic Nutrition's Dual Power

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

Table of content

The food spectrum - where do you stand? 🌈

  • Autotrophs: The DIY experts! 🌱 They make their own carbon compounds from basics like carbon dioxide.

    • Real-world example: Plants in your backyard making their food via photosynthesis.
  • Heterotrophs: The foodies! 🍔 They depend on others and obtain their carbon compounds from different organisms.

    • Real-world example: Humans munching on a sandwich.
  • Mixotrophs: The best of both worlds! 🌱🍔 They're neither strictly DIY experts nor just foodies. They use both methods of getting their nutrition.

Types of mixotrophs - because variety is the spice of life 🌍

  • Facultative Mixotrophs: The flexible ones! 🤸

    • Can be 100% DIY, 100% foodie, or sometimes both!
    • Star Performer: Euglena gracilis 🌟
      • Has chloroplasts and enjoys sunbathing to do photosynthesis when it’s sunny.
      • But on a cloudy day? It might just snack on some debris or tiny organisms by wrapping them up (a process called endocytosis).
  • Obligate Mixotrophs: The multitaskers who can’t pick sides! 🌱🍔

    • They NEED both DIY and foodie methods to grow.
    • Why? Some might need a special carbon compound from their food which they can't make on their own.
    • Some cheeky protists without chloroplasts steal them from algae, sort of like "borrowing" a friend’s homework. These borrowed chloroplasts, called “klepto-chloroplasts,” help them do photosynthesis till they wear out and need replacing.

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 🌟