2. how has genetics, combined with
paleontology, added to our
understanding of evolution?

To find the extinct species and their divergence of characters can be studied using molecular genetic techniques.

Explanation:

Paleontology is the study of ancient species and their remaining that were found millions of years ago. These species extinction can be found and manipulated to find out the origin or divergence of species from their originThe samples of these species may contains their remains that help the biologist to isolate and analyze their protein or DNA. when the DNA is isolated their sequences can be generated using molecular biology techniques. When the sequences are identified by advanced molecular biology techniques, the existence and similarities of different species due to their convergence or divergence can be identified.By identifying the convergence or divergence the characteristics, evolutionary change in behavior, variation in appearance can be studied.By using these techniques, biologist have found that homo sapiens  are 99% have their similarities with chimpanzee Thus, using genetics in paleontology helps us to understand adaptation a species is changing according to the evolutionary changes.

Very hard to understand

Humans can affect weathering and erosion in several ways.  humans cause  increases in acid rain and pollution, which increase the amount of  weathering  agents in the air and water, and then on land.for an easy answer: 1) acid rain2) pollution