Please help !! How many units of energy would there need to be in the first trophic level to end up
with 1000 units of energy in the second? In the third? In the fourth?

Adigestive system that is a series of tubes beginning at the mouth and ending at the anus is a digestive system.

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.

Penelope studies how the structure and function of the nervous system is related to behavior. she is a psychologist