Peppered moths come in two colors, black and white. what did kettlewell show, with regard to peppered moth populations and tree coloring? (recall that england at the time was heated mainly by coal in urban areas.)

Look at the picture below . what does this picture represent ?

Facilitates growth and change in neurons and the migration of neurons to different sites in the brain

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