4. What kind of material is found in the C horizon of a soil profile?
O
clay particles
O mineral and organic matter
O hardpan
O partially weathered parent material

What is thought to have caused the mass extinction at the end of the cretaceous period?

How does upwelling affect coastal fisheries? upwelling damages nutrient supplies at coastal fisheries as the warm, nutrient-rich surface water is replaced by nutrient-poor, cold water. upwelling damages nutrient supplies at coastal fisheries as the cold, nutrient-rich surface water is replaced by nutrient-poor, warm water. upwelling improves the nutrient supply at coastal fisheries as the warm, nutrient-rich surface water replaces the nutrient-poor, cold water. upwelling improves the nutrient supply at coastal fisheries as cold, nutrient-rich water replaces the warm, nutrient-poor surface water.

Crossing over and independent assortment are important activities that occur during meiosis. what is the significance of these activities