AP BIOLOGY

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LABORATORY REVIEW

MITOSIS AND MEIOSIS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The possibility of life on Mars is a subject of significant interest to astrobiology due to its proximity and similarities to Earth. To date, no proof has been found of past or present life on Mars. Cumulative evidence shows that during the ancient Noachian time period, the surface environment of Mars had liquid water and may have been habitable for microorganisms. The existence of habitable conditions does not necessarily indicate the presence of life.A new organism from Mars has been discovered, and its genome has n=12. Although these organisms are fluorescent green, their cells undergo meiosis and mitosis in the exact same way that human cells do. If this is the case then how many chromosomes will it have after mitosis?
A
12
B
24
C
34
D
6
Explanation: 

Detailed explanation-1: -The confirmation that liquid water once flowed on Mars, the existence of nutrients, and the previous discovery of a past magnetic field that protected the planet from cosmic and solar radiation, together strongly suggest that Mars could have had the environmental factors to support life.

Detailed explanation-2: -Its thin atmosphere cannot block ultraviolet radiation from space, which would devastate any known living thing on the surface of the planet. But Mars, which is as old as Earth, might have been more hospitable in the past. The gullies and dry lake beds that mark the planet indicate that water once flowed there.

Detailed explanation-3: -Since liquid water is essential for life, scientists want to know if life emerged on Mars and search for evidence of ancient Martian life by examining Mars rocks for organic molecules such as amino acids.

Detailed explanation-4: -Mars was capable of supporting microbial life in the distant past, scientists announced today (March 12). They reached this conclusion after studying the latest observations from NASA’s Curiosity rover, which just analyzed the first-ever sample collected from the interior of a Red Planet rock.

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