A scientist designs an experiment in which the movement of polar molecules through a cell membrane is tested. He sets up the following two experiments
in order to collect data on cell membrane permeability. What question is the
scientist most likely trying to answer by conducting this experiment?

The development of_ factored in the development of complex organisms.

How many copies of each chromosomes should be present in each of the 4 final haploid versions of gamete?

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.