Some seed species can only germinate and sprout after they have gone through a fire. True
False

Why should the united state be concerned about air pollution in china?

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.

Why are scientists concerned about the depletion of the ozone levels in the stratosphere?