Afarmer grows corn on his farm year after year, without a break. what will most likely happen on this farm? a) the soil will slowly be washed away. b) the farmer will not need fertilizer to grow corn. c) the soil will have no nutrients to grow the corn. d) the amount of corn harvested will increase every year.

Which of the four major uses is predicted to change the least by 2020?

Some birds look for food near cattle and other livestock. the movement of the cattle churns up the ground, making insects available to the birds. the cattle appear to be unaffected by the presence of the birds. what kind of relationship exists between the birds and the cattle? o a. parasitism o b. commensalism o c. predation o d. mutualism

Which of these best describes what occurs during cytokinesis? a) the chromosomes are separated b) the cell begins to divide by replicating the chromosomes c) the cytoplasm is divided between the two new daughter cells d) the nucleus opens to allow the chromosomes to enter the cytoplasm