An aquatic arthropod called a cyclops has antennae that are either smooth or barbed. the allele for barbs is dominant. in the same organism, resistance to pesticides is a recessive trait. make a "key" to show all the possible genotypes (and phenotypes) of this organism.

The gene that causes sickle-cell disease is present in a higher percentage of residents of sub-saharan africa than among those of african descent living in the united states. even though this gene causes sickle-cell disease, it also provides some protection from malaria, a serious disease that is widespread in sub-saharan africa but absent in the united states. discuss an evolutionary process that could account for the different percentages of the sickle-cell gene among residents of the two regions.

Which of the following is not a possible effectof increasimg carbon dioxide levels in the atmosphere ?

Which box will not accelerate? 4 newtons 4 newtons 4 newtons 25 kg 4 newtons 15 newtons 10 kg 30 newtons 40 newtons 50 kg 30 newtons 30 newtons