Question

Exobiologists might find algae on Mars that are similar to stromatolites on earth because __________

• A. On our planet, stromatolites are formed by microscopic algae.
• B. Martian lake beds may contain fossilized remains of algae similar to stromatolites on earth.
• C. There is evidence that photosynthesis, which takes place in earth's algae, can be found in Martian algae too.
• D. All of the above

Answer 1

Answer: (B)

Martian lake beds may contain fossilized remains of algae similar to stromatolites on earth.

The passage mentions that Martian algae might have gone through the same process of forming fossils on lake beds as that which forms stromatolites on Earth. Hence, option B is the right answer.