Mineral

if i said that mineral had “glassy” luster, but you looked at another sample of the same mineral and thought it had a “dull or earthy shine”, then how could that be? why isn’t luster a good property to identify minerals on its own?

Which of the following is not a main characteristic that scientists focus on when determining which kingdom an organism belongs to

Most of the fossils found in virginia are in the coastal plain, valley, ridge, and appalachian plateau regions, best suggesting that these geographic provinces a) were once covered by seawater. b) are the oldest parts of virginia. c) have a great deal of karst topography. d) have large amounts of sedimentary rock.

Which enzymes break down carbohydrates?