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Classifying Living Things

Across
One-celled organism without a nucleus
Almost all of these are insects
Animals that begin life in the water but live life mostly on land
A plant without tubes
Animal whose body temperature changes with air temperature and have scales
The outer boundary of an animal cell
The process used by plants to make food from sunlight
Too small to be seen with the eye alone
A multicelled organism with a backbone
Animal with feathers
The outer boundary of a plant cell
A living thing
Down
Animals that bear live young
Organisms that grow on living things and absorb food from them
The jellylike substance inside a cell
A cell that has chloroplasts
The brain of a cell
A multicelled organism without a backbone
One-celled organism that has a nucleus
A plant with tubes that deliver food and water