Two species of cicada have always lived in the same overlapping area since they diverged from their common ancestor. one species emerges and mates every 5 years, and the other species emerges and mates every 13 years. these species are an example of speciation with a premating barrier.
a. sympatric, behavioral
b. parapatric, geographical
c. parapatric, behavioral
d. allopatric, temporal
e. sympatric, temporal

Astudent analyzed ears of corn that demonstrated two traits in the f2 kernels, purple or white colors and smooth on wrinkled shapes. a tabulation of 135 individual kernels gave the following results: purple and smooth = 75 white and smooth = 28 purple and wrinkled = 24 white and wrinkled = 8 what would be the only phenotype present in the f1 ger

Students in biology are studying the macromolecules of life. they used a calorimeter to determine the calories in various types of food. once the lab was completed, the students ate the left over food samples. monica commented that in just 6 or 7 "chews" of the saltine, it was gone; nothing but a sticky paste in her mouth. elaborate on what happened chemically while chewing the saltine. include the macromolecules present.

Explain how the political influence of african americans leaders became weaker.