极地海域的主要初级生产者是 A: Seaweed B: Seagrass C: Phytoplankton D: Bacteria

Q1. Seagrass plants are? A: Mostly herbaceous B: Mostly woody C: Non flowering plants D: A type of algae

Q19. Select a primary producer from the list A: Sharks B: Urchins C: Seagrass D: Worms E: Birds