Cell Theory And Evolution Flashcards
0
Q
Why is the fossil record flawed?
A
It is biased and incomplete.
1
Q
What are the two types of dating?
A
Absolute and relative.
2
Q
What does LUCA stand for?
A
Last universal common ancestor.
3
Q
Explain the Oparin-Haldane theory - Life from abiotic synthesis of organic monomers.
A
- Abiotic synthesis of small organic molecules (e.g. amino acids).
- Joining of monomers to form polymers.
- Origin of self-replicating molecules.
- Packaging of all these molecules into protobionts (droplets with membranes).
4
Q
Explain the iron-sulphur world theory.
A
Early life may have been formed on the surface of iron sulphide minerals. The catalytic metal centres catalysed carbon fixation generating small organic compounds.
5
Q
What is required to decrease entropy?
A
Work.
6
Q
How do you calculate Gibbs free energy?
A
Change in free energy - change in enthalpy = temperature times change in entropy.
