Lecture 14 - Protists Flashcards
1
Q
What is the difference between phototrophs and chemotrophs?
A
Phototrophs get energy from light and chemotrophs get energy from chemicals.
2
Q
What is the difference between autotrophs and heterotrophs?
A
Autotrophs use inorganic carbon and heterotrophs use organic carbon.
3
Q
What kind of group are protists?
A
Paraphyletic
4
Q
What are 5 key innovations in protists?
A
- Diverse protection and support structures
- Endosymbiosis
- Multicellularity (although most protists are unicellular)
- Nuclear envelope
- Changes to internal and external structures creating more opportunities for diversity
5
Q
What kind of group are organisms with mitochondria?
A
They are a monophyletic clade.
6
Q
How were red and green algae created?
A
They were formed through primary endosymbiosis where a eukaryote engulfed a photosynthetic prokaryote.
7
Q
What led to diversity in photosynthetic protists?
A
Secondary endosymbiosis
