A geologist finds four layers of sedimentary rock. She determines that no geological events have shifted the layers. She labels the layers A, B,C and D from the top to the bottom. which statement about these layers is accurate?

A is older than B
B is older than C
C is younger than A
B is younger than D

Look at the photo of the leaf. which term best describes this leaf?

Match the description of each organism to the appropriate category

1. -define adaptation2 explain darwin's theories of descent with modification and natural selection in detail3. -explain how each of these provides evidence for evolution: a. -fossil record, including superposition and transitional fossilsb-anatomy, including homologous structuresc-biological molecules, including dna and proteins4. -explain the difference between convergent and divergent evolution.5. -define and give three examples of artificial selection6. -define and give one example of coevolution.7. -explain biodiversity and how it benefits humans.8. -explain a type of population lest affected by environmental change.