Single Celled Organisms Flashcards
1
Q
Name of single celled eukaryotic cells
A
Protoctistan
2
Q
Example of protoctistan
A
Ameoba
3
Q
Where do protoctistan live
A
In fresh water
4
Q
How do protocistan locomote
A
By constantly changing shape
5
Q
How do ameoba get their o2 and co2
A
Simple diffusion
6
Q
Why do amoeba not need specialised gas exchange system
A
The have a small size and their for a large sa:v ratio
7
Q
Name all the parts of a protocistan
A
- pseudopodium
- cell-surface membrane
- contractile vacuole
8
Q
What is contractile vacuole
A
Its used to maintain the osmotic equilibrium
9
Q
What the pseudopodium
A
Stretches cell membrane
10
Q
How is SA made big
A
They have a high SA:V
11
Q
How is CG made big
A
O2 used up and CO2 produced
12
Q
How is DD made small
A
Gases only have to cross plasma membrane
