This is a characteristic of minerals. it describes the mineral's resistance to fractures or scratches.

Of the pollutants that form acids in the atmosphere, which is easiest to reduce? a. sulfur dioxide b. nitrogen dioxide c. ozone d. carbon monoxide

Aperson with age is more likely to catch diseases that healthy people usually don’t catch. what are these infections called?

Astudent is looking through a microscope at some cells of an onion root tip. many of these cells are undergoing division since the root tip grows quickly and requires more cells. which cell most recently underwent metaphase? w x y z