Most preserved remains are parts of organisms such as bones

The difference(s) between the grand canyon and valles marineris is/are: (a) the grand canyon was formed by water, but valles marineris was not. (a) valles marineris is much longer than the grand canyon. (c) valles marineris is much wider than the grand canyon. (d) valles marineris has large volcanoes near it. all of the above

Based on current rates the earths human population is expected to grow how much by 2050

The inner planets mercury, venus, earth, and mars were formed by