Organisms are classified by shared characteristics. They are first classified into three _____ based on their cell structure and where they can live. The three domains are bacteria, archaea, and eukarya. The domain _____ can be broken down further into four kingdoms. The kingdom fungi are typically multicellular and are decomposers, such as mushrooms. The kingdom _____ are unicellular eukaryotes, such as algae. The kingdom plantae are multicellular _____, such as flowers. The kingdom animalia are all multicellular _____, such as humans.

The correct answer to fill in the blanks is:

1. domains
2. eukarya
3. protista
4. autotrophs
5. heterotrophs

Explanation:

Organisms are classified into three domains based on their cell structure and where they can live, namely bacteria, archaea, and eukarya. The domain eukarya includes complex organisms and can be further divided into kingdoms, one of which is protista, consisting of mostly unicellular eukaryotes like algae. The kingdom plantae refers to multicellular autotrophs, which produce their own food, like flowers, while the kingdom animalia comprises multicellular heterotrophs, which need to consume other organisms for energy, like humans.