Why Is the Possible Contamination of the Earth by Martian

question 7

Multiple Choice

Why is the possible contamination of the Earth by Martian microbes in a future sample return mission not considered to be a significant problem?

• A) Martian microbes will certainly be destroyed by terrestrial microbes
• B) any Martian microbes will be destroyed by high-energy particles and radiation on their trip back to Earth
• C) Martian microbes will be rapidly destroyed by oxygen in the Earth's atmosphere
• D) Martian microbes are likely to be quite different than terrestrial microbes and, hence, will probably not be able to affect life on Earth

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Definitions:

Blocking Variable

A variable that is used to group experimental units in a way that reduces variation in the response variable.

Weather

The condition of the atmosphere at a particular place and time, including temperature, humidity, wind, and precipitation.

Grazing Varieties

Types or breeds of animals or plants that are particularly suited or used for grazing, affecting ecosystems and agricultural practices.

Observational Study

A study where the researcher observes and records behavior or outcomes without manipulating any variables.