AP BIOLOGY

Detailed explanation-1: -Grass produces its own food through photosynthesis. It is a primary producer at the bottom of the food chain. Primary producers are the 1st trophic level.

Detailed explanation-2: -The second food chain, the plankton are the producers and fishes are second level consumers but they do not exist in the terrestrial food chain. Whereas, the other organisms such as grasshoppers and man are of terrestrial food chain but the two cannot be linked in a food chain.

Detailed explanation-3: -The answer is grass. Organisms are living things. Living things have the ability to reproduce, grow, and breathe. They are made of cells.

Detailed explanation-4: -The mouse and the hawk are at the third and fourth levels of the food chain example. Like the grasshopper, they are consumers. However, the mouse and the hawk are consumers called carnivores because they eat other animals.