7.4 Life On Earth Flashcards
Why do we not know how the molecules of the simplest living things were formed?
We do not know how the molecules of the simplest living things were formed because we don’t have sufficient evidence.
Do we know how the molecules of the simplest living things were formed?
No, we do not know how the molecules of the simplest living things were formed.
What did plants that produced oxygen in the atmosphere probably evolve from?
Plants that produced oxygen in the atmosphere probably evolved from plankton and algae in the ancient oceans.
What probably evolved from plankton and algae in the ancient oceans?
Plants that produced oxygen in the atmosphere probably evolved from plankton and algae in the ancient oceans.
What is the Miller-Urey experiment based on?
The Miller-Urey experiment is based on what scientists at the time thought was in the Earth’s early atmosphere.
What key experiment is based on what scientists at the time thought was in the Earth’s early atmosphere?
The key experiment that is based on what scientists thought was in the Earth’s early atmosphere is the Miller-Urey experiment.
What mixture of gases and something else was involved in the Miller-Urey experiment?
A mixture of water, ammonia, methane and hydrogen as well as a high voltage spark (to simulate lightning) was used in the Miller-Urey experiment.
What was a mixture of water, ammonia, methane and hydrogen as well as a high voltage spark (to simulate lighting) involved in?
A mixture of water, ammonia, methane and hydrogen as well as a high voltage spark (to simulate lightning) was involved in the Miller-Urey experiment.
After the Miller-Urey experiment had been left for 1 week what was found?
After 1 week scientists found that amino acids had been produced.
Why was the discovery of amino acids in the Miller-Urey experiment important?
The discovery of amino acids in the Miller-Urey experiment was important because it meant that scientists had found that the building blocks for proteins had been produced.
At what stage in the Miller-Urey experiment were the building blocks for proteins found, and what were these?
After 1 week of the Miller-Urey experiment had passed, amino acids were found. Therefore, the building blocks for proteins, amino acids, had been produced.
What can we learn from the Miller Urey experiment with regards to the composition of amino acids?
From the Miller Urey experiment we can learn that amino acids contain carbon, hydrogen, nitrogen and oxygen.
What contains carbon, hydrogen, nitrogen and oxygen and how do we know this?
From the Miller Urey experiment we know that amino acids contain carbon, hydrogen, nitrogen and oxygen.
What can we conclude from what we know about he composition of amino acids, thanks to the Miller Urey experiment?
From our knowledge from the Miller-Urey experiment that amino acids contain carbon, hydrogen, nitrogen and oxygen, we can conclude that any planet that has these gases in its atmosphere could, in theory, support some basic life forms.
