The phrase that should be written in the column titled 'sometimes' is 'irregular occurrences'.
<h3>What are the characteristics of animals?</h3>
The characteristics of animals are those features that area exhibited by animals which distinguishes them from other living things.
Some of the characteristics of animals include the following:
- Eukaryotic Cell Structure.
- A Blastula Stage of Development,
- Motility (The Ability to Move),
- Heterotrophy (The Ability to Ingest Food), and
- Advanced Nervous Systems.
Not all these features are seen in all animals that is the reason why there should be a column for always and sometimes which can be replaced with the phrase 'irregular occurrences'.
Learn more about characteristics of animal here:
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