The chart shows four stages of demographic transition. Which stage is characterized by high birth and death rates?
A. Postindustrial
B. Industrial
C. Transitional
D. Preindustrial

Which of the following effects does the recessive allele have in an organism which also displays a dominant allele? a.the recessive allele will turn into a dominant allele b.the gene will have a disorder c.the dominant allele will become recessive d.it has no effect