Why must lander probes on Mars be sterilized before launch?
A) to prevent terrestrial microbes hitching a ride on the probe and contaminating the Martian surface
B) to prevent terrestrial microbes destroying the electronics in the probe during its passage to Mars
C) to prevent Martian dust from building up on the probe on the surface
D) to prevent Martian microbes from contaminating the lander probe
Question 2
Telescopic observations of distant galaxies have shown that the universe is
A) expanding
B) contracting
C) static and unchanging
D) infinite in size
Cade and colleagues discovered a way to improve athletic performance and prevent salt and water imba
Mars's average distance from the Sun is roughly 230 million km (1.5 AU) and its orbital period
Changing Seasons on Mars
To prevent ignition and fuel-injection operation while the engine is being cranked, remove both the ...
Use face cradle covers to prevent the client’s skin from touching the face cradle upholstery.
IUD to prevent pregnancy اللولب النحاسي لمنع الحمل