Views on the origin of life
Answers are for parents and teachers.
1
Describe three views on the origin of life (scientific and non-scientific) in one sentence each.
Divine creation – a matter of faith; panspermia – life from space; chemical evolution – organic substances formed by abiogenic means.
2
Write the essence and importance of Pasteur’s experiment.
The liquid stayed clean in a swan-neck flask: microbes come from the air. It underlies pasteurisation and sterilisation.
3
In a flask one bacterium doubles every 20 minutes. How many are there after 1 hour? (Number only.)
8
4
Why did boiling food for storage become reliable after Pasteur’s experiment?
Boiling kills existing microbes, and if the container is sealed no new microbes enter, so the food does not spoil.
5
State at least one limitation of Redi’s experiment.
It showed this only for flies; for microbes it was shown later by Pasteur.