▶ Your Answer :
The lecture discuss the issue of whether there is some type of organisms in Mars or not. With the respect to the topic, the lecturer asserts that the arguement that some organisms exist in Mars is not reasonable. This casts doubt the reading passage's claim that Mars could have some lives for certain three reasons.
To begin with, the lecturer argues that methane can be producted by organisms and inorganisms, so the existing Mathane gas on Mars is not a sufficient evidence that can explains that being organisms in there. This contradincts the reading passage's claim that a recent discovery of a large quantity of mathane gas in Mars by NASA is a clue that ratifies existence of organisms in there.
On top of that, the second point of the lecture is that the meteorite which contains the evidences of organisms stayed for a long time before it was discovered. Thus, the carbon molecules and the fossils could be from the Earth. This directly opposes the reading passage's claim that carbon which is an essential ingredient in all life forms and fossils of primitive bacteria are from Mars, meaning there are some lives.
The final point in the lecture is that liquid water, not ice or vapor, is necessary for life. Mars' environment is too extreme to be liquid water. Thus, mars couldn't have life forms because there in no liquid water. This explanation counters the reading passage's claim that NASA extracted water molecules from Martain soil which is from Mars and it is strong evidence that the planet could support life. |