Galapagos sea lions and seals : adaptations structural, psychological, behavioural, abiotic and biotic

How many trophic levels are there in the following food chain? phytoplankton - shrimp - perch - pike - osprey

Fossils can only be formed when? if mud, silt or tar is in the area to preserve the fossil ierosion does not occur and allows the fossil to form oxygen and microorganisms cannot decay the bones the area is dry and does not contain mud or silt

What types of energy transfers and energy transportations are involved in the domino chain reaction?