Suppose the cells of a tumor are idealized as spheres each with a radius of 5 mum (micrometers). the number of cells has a doubling time of 35 days. approximately how long will it take a single cell to grow into a multi-celled spherical tumor with a volume of 0.2 cmcubed (1 cmequals10,000 mum)

1. variations in a population of moths allow for some of its members to be able to adapt to environmental changes. the better adapted of the moths will be able to survive the change and thus prevail as the “fittest” of the species. (a) describe three mechanisms in which variation can occur within a species population. (b) explain which mechanism or mechanisms would be responsible for the survival of a population of peppered moths better than white moths in an environment affected by industrial soot. justify your answer.

According to the cladogram, which organisms have roundworms as a common ancestor?

Do you think the gene eef1 alpha1 supports cell theory? explain your response.