What kind of material to cleanse ground water through the exchange of compounds and elements?

In some plants, pointed leaves (p) are dominant over rounded leaves (p). a plant with a genotype of pp

As a small change in a person's dna can cause a genetic disorder

Homo heidelbergensis was a tall, muscular hunter, who used both tools and weapons. because h. heidelbergensis was not a gatherer/forager, but ate a varied diet including meat and fish, we would expect to see what anatomical changes?