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WorksheetsWhat defines an animal?
Total questions: 10
Worksheet time: 50mins
Scientists estimate that there are about 500,000 known species of animals on Earth.
True
False
Animals can be classified according to whether or not they have a backbone.
True
False
A vertebrate is an animal that does not have a backbone.
True
False
Worms, spiders, and snails are examples of invertebrates.
True
False
Invertebrates make up about 95 percent of the animal kingdom.
True
False
Symmetry can help identify the kingdom to which an animal belongs.
True
False
Symmetry refers to an animal's molecular state.
True
False
Molecules in an animal's cells can be used for classification purposes.
True
False
The more similar the DNA of two animals are, the more distantly they are related.
True
False
New discoveries about relationships among species have come from observation of species.
True
False
