A plain is covered in a species of tall grass (primary produ…

A plain is covered in a species of tall grass (primary producer). One primary consumer species eats the grass. One secondary consumer species eats the primary consumer. And one tertiary consumer species is at the top of the food chain. Which of these is the dominant species on this plain?

You find a worm in a moist environment. It has bilateral sym…

You find a worm in a moist environment. It has bilateral symmetry, an incomplete digestive system, and no segments. It does not have a circulatory system. It does not have a coelom, or even a pseudocoelom (fake body cavity) – it has no body cavity at all!  This organism is most likely to be…