Which of the following mechanisms of change in genefrequencies is responsible for the antibiotic resistance of E. coli in this experiment? A. founder effect

B. natural selection

C. population bottleneck

D. genetic drift

Plsss > .< compare and contrast the characteristics of flatworms rounds worms and earthworms

During the process of two rails or sides break apart and attract new nucleotide bases to form a new and complete strand.

Prior to the mt. st. helens eruption on may 18, 1980, satellite and topographic views of the volcano were captured. based on the topographic map of mt. st. helens, what is the contour interval if the volcano height is 2,950 m? question 9 options: 600 m 400 m 750 m 500 m