Which of the following is NOT evidence for liquid water on the surface of Mars? Select one: a. dunes along the shorelines of an ancient ocean b. Branching channels that were once riverbeds c. Microscopic fossils d. Glaciers e. conglomerates in stream-bed formations

Option A.

Explanation:

Mars is the second smallest planet aside from Mercury and it's is the fourth planet in the solar system. Evidences has shown that liquid water is on the surface of the Mars. All most all water exist as ice on Mars. These evidences are gullies, lake beds, ancients rivers valley, Delta, conglomerates in stream bed formations.

true                                                                                                       true true true true true true

the correct answer is 4) heat and pressure

metamorphic rocks arise from transformation of existing rocks types, in a process called metamorphism. during metamorphism the original rock(prolith) change into metamorphic rock by heating (150-200c) and pressure of more than 1000 bar. the original rock can be sedimentary, igneous, or existing metamorphic rock.