Nitrogen exists as a in the atmosphere where __ atoms of nitrogen are bound together.

The seed coat's most important function is to provide a) a nonstressful environment for the megasporangium. b) the means for dispersal. c) dormancy. d) a nutrient supply for the embryo. e) desiccation resistance.

20 the compound al(nh3)2 has atoms of nitrogen.

Which feature of a human community is similar to a niche in a biological community