What structure quickly shoots water out to propel a mollusk forward in water? radula coelom trochophore siphon

Which of the following occurs after a natural or unnatural disturbance in an ecosystem

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.

9. the history of life on earth is recorded in