System realm sorts species by the broad kind of environment they belong to, such as terrestrial, freshwater or marine. Wikipedia notes the giant panda lives "in six montane regions," entirely on land, placing it firmly in the terrestrial realm rather than a freshwater or marine one. This dimension groups species that depend on the same broad kind of environment.
Facts
Comparison
Reproductive Mode System (Realm)
Sources
1. Wikipedia: Echinoderm
WikipediaEchinoderm, Reproduction sectionQuote, Echinoderm, Reproduction section
The eggs and sperm cells are typically released into open water, where fertilisation takes place.
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