The common fruit fly drosophila melanogaster is the most studied organism in genetic research because it is small, is easy to grow, and reproduces rapidly. the length of the thorax (where the wings and legs attach) in a population of male fruit flies is approximately normal with mean 0.800 millimeters (mm) and standard deviation 0.077 mm. (round your answers to four decimal places.) (a) what proportion of flies have thorax lengths less than 0.7 mm?

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 fossils not found in igneous rocks? igneous rocks are made from cooling of lava or magma. igneous rocks are found too deep underground. igneous rocks are too dark in color to contain fossils. igneous rocks are too dense to contain fossils.

9. the history of life on earth is recorded in