Which of these practices does the most to keep the water table from dropping near a farm? a. crop rotation b. soil erosion c. cover crops d. drip irrigation

When water freezes, it . contracts expands

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

Identify the product of genetic engineering.