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Guppies have the most advanced reproductive methods.
The planaria class is Turbellaria
Planaria are type of animals. Animals are not photosynthetic
planeriacomes under kingdom animalea
sp refers to a planaria where the actual species is undetermined...or sometimes because several species of planaria have similar appearance or behavior and have been used in a study.
Planaria exist only in fresh waters.
Usually a planaria regeneration experiment involves cutting the planaria into different parts. The head can be separated from the tail or the planaria can be cut lengthwise, etc. After cutting the planaria, it will be observed for few days noting how the organism regenerate its lost body parts. Read more on planaria regeneration on t he link provided below.
Planaria prefer dark environments
Spores
The scientific name for planaria is flatworms in the class Turbellaria, with species such as Dugesia tigrina commonly used in research and education.
By surgery. There are no other methods that work
Some do. Invertebrate have a wide variety of reproductive methods.