Cnidarians and Poriferan
Cnidarians and Poriferans do not contain excretory systems. Do platyhelminthes encompass an excretory system?
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Platyhelminthes contain a primitive excretory system made up of flame cells (also termed as solenocytes), excretory pores and excretory ducts.
Which chordate class is considered as an example of transition of vertebrates from aquatic to the dry land environment?
List in order the steps involved in the break down of glucose
Explain the term gametes?
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