2. Life in water and its evolution to land

Question 1

Explain the difference between RNA and DNA.

Answer 1

RNA is in most cases one-stringed, while DNA is double-stringed. First was RNA, DNA came later.
There isn’t a cell which doesn’t have DNA.
DNA is much more stable than RNA (because it has two strings).
Every living being has both DNA and RNA.
DNA is the cook with recipes, while RNA the helper.
RNA and DNA don’t have the same sugar. They have different recipes, but the same product.

Question 2

What is the RNA world?

Answer 2

RNA world was a period in time where all organisms had only RNA.

Question 3

From where did the first cells get energy? What was the consequence of this?

Answer 3

From organic molecules in the environment. The consequence was the development of metablism.

Question 4

What is metabolism?

Answer 4

Metabolism are all the proccesses in a cell.

Question 5

What is chemosynthesis?

Answer 5

Chemosynthesis is the usage of chemical energy to produce organic molecules.