Describe the three main properties that scientists measure when they study populations

Size, density, and growth rate are the three main ones. There is also dispersion, age structure, and survivorship. Hope this helps!

1) the mayans built pyramids just like the egyptians. the mayans also used hieroglyphics like them.2) power was passed down by family. for example, if the father dies, the son would be the next king.3)they both built pyramids for their structures.4)the main crop for the mayans was maize.5)they also grew manioc, beans,  squash,  amaranth, and chile peppers.

Yes, take risk in life