Is human interference ecosystems always a
good thing or always a bad thing? think of one
time that humans have improved ecosystems
and one way they have damaged them.

Cells of an organism tell each other when predators are near.

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.

They are both used to view parts of the cell