and 20 describe the organism that scientists believe was responsible for changing the composition of the early atmosphere. what is it called and how did it change the atmosphere? why was this change to the atmosphere so important? enter your answer in the space provided.

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.

At which point is crust neither created nor destroyed? island chain mid-ocean ridge divergent boundary transform boundary

Why is a mushroom considered a heterotroph