from the cross ab/ab x ab/ab, what is the recombination frequency if the progeny numbers are 72 ab/ab, 68 ab/ab, 17 ab/ab, and 21 ab/ab?

Which of these is an example of land degradation? a. containers designed to store pollutants leak. b. fertilizers provide too many nutrients to crops. c. garbage is buried so the land can be reclaimed later. d. a drought kills all the plants in an area, leaving bare land

Which are evidence of seafloor spreading? check all that apply. molten material magnetic stripes continent material drilled core samples ocean water samples

Which of these correctly describes the difference between processes that take place in prokaryotic and eukaryotic cells?