How does photosynthesis in a purple bacterium (class anoxyphotobacteria) differ from photosynthesis in an oak tree?

In general in which direction does wind blow

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

Name the organs of humanelemintary canal.