Lecture 10 Flashcards
1
Q
Prokaryote?
A
First life, unicellular, dominate biosphere
2
Q
What are stromatolites?
A
(cyanobacteria+sediments)
3
Q
Plasmids?
A
Small rings of DNA with extra genes
4
Q
Exaption?
A
existing structures take in new function through descent with modification
5
Q
What does cell wall do?
A
- cell shape
- protection
- Prevents cell from exploding (lysis) when placed in hypotonic solution (external environment is lower in solutes than cell contents)
6
Q
What are archaea?
A
Ancient
7
Q
Extremophiles?
A
Living in extreme habitat
8
Q
Methanogens?
A
live in oxygen free habitat and produce methane
9
Q
Halophiles?
A
Live in salty habitats
10
Q
Thermophiles?
A
Live in very hot habitats
11
Q
obligate anaerobes?
A
descendants
