I need help with quiz plz include explanation

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

Chlorophyll is found in plant leaves and absorbs light from the sun to enable plants to perform photosynthesis. magnesium is an important component of chlorophyll. the concentration of magnesium ions is higher in the root-hair cells of plants than in the soil. which mechanism of ion uptake would best enable a plant to produce a steady supply of chlorophyll? osmosis diffusion passive transport active transport

Which of the following is not considered an appendage of the skin? nails glands follicles none of the above