The term air pressure is used to refer to the weight of the atmosphere pressing down on the earth's surface. what creates air pressure?

Aseries of connections of food chain in an ecosystem is called a what

Explain two reasons you think it is important for scientists to search for new ways to treat cancer

The phylogenetic tree illustrates the relationship between humans and our closest living relatives. the tree was based on biochemical comparisons, including dna and amino acid sequences. according to the biomolecular data, we could infer that a) the four organisms do not have a common ancestor. b) humans are more closely related to chimps than any other apes. c) chimps are more closely related to gorillas than they are to humans. eliminate d) there is no evidence if any relationship between the four branches on the tree.