Given a scientific question, generate a correct answer to it.

Input: Consider Input: In addition to insects, what large invertebrate phylum includes animals such as spiders, centipedes, and lobsters?

Output: arthropoda

Input: Consider Input: Chewing a bite of bread mixes it with what and facilitates its chemical breakdown?

Output: saliva

Input: Consider Input: What is a group of similar ecosystems with the same general abiotic factors and primary producers called?
Output: biome