1. what are the levels of ecological organization?
1__organism_ -- one single individual
2_population
- a group of individuals of the same species
community - all the biotic factors in an area
ecosystem
- all the biotic and abiotic factors in an area
5 region - an area on the earth characterized by climate
biosphere
- the entire earth
3
4

The diagram below shows the layers of a rock having a trilobite: a rock column labeled rock is shown. the column has three layers. the bottommost layer of the rock has one shaded rhomboid shape, the middle layer has a rhombus with a diagonal along with two identical organisms marked as, trilobite, in the key, the top layer has two semicircles. a key is shown on the right side of the diagram. the shaded rhombus is marked as a, the rhombus with the diagonal is marked as b, the semicircle is marked as c which statement about the rock fossils is true?