7) Do the sources you find show bias in their description of how harmful acid rain is? (Can you find one that claims acid rain is not harmful?) ASAP PLSS!!!

The development of_ factored in the development of complex organisms.

The table shows dates and appearance of index fossils. which rock layers can be dated most precisely? a) a layer containing both a fossil 4 and a fossil 3 b) a layer containing both a fossil 2 and a fossil 3 c) a layer containing both a fossil 1 and a fossil 4 d) a layer containing both a fossil 1 and a fossil 2

In which of the following relationships is one organism always benefited while the other organism is always harmed