20) What was one reason that RNA was eventually replaced by… 20) What was one reason that RNA was eventually replaced by DNA as the molecule of choice for storing genetic information? Read Details
33) What kind of clouds are known to exist on Mars? 33) What kind of clouds are known to exist on Mars? Read Details
35) The Martian meteorite ALH84001 was found in the 35) The Martian meteorite ALH84001 was found in the Read Details
7) What was ***NOT*** an important source of prebiotic molec… 7) What was ***NOT*** an important source of prebiotic molecules (e.g., amino acids) on the early Earth? Read Details
3) Which of the following is **not** evidence that has been… 3) Which of the following is **not** evidence that has been found for liquid water on Mars’ surface in the past? Read Details
24) How does the surface temperature and atmospheric pressur… 24) How does the surface temperature and atmospheric pressure on Venus compare with the Earth? Read Details
14) A large piece of debris that only partially burns up in… 14) A large piece of debris that only partially burns up in the atmosphere, leaving a fragment to hit the surface, is called Read Details
2) The biggest obstacle to life being present in the atmosph… 2) The biggest obstacle to life being present in the atmospheres of Jupiter and Saturn is the Read Details
