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environmental factors affecting marketing activities
Temperature and moisture.
Heat
Externally
Agnatha is a superclass of the phylum Chordata. It contains the jawless fish. Two common examples of this would be the lamprey and the hagfish.
Agnatha are ancient jawless fish that include lampreys and hagfish. They are also probably the earliest vertebrates and have ectoderm.
The term environmental pressure refers to any factor that affects how a given animal or plant reproduces or lives.
skin
without jaws
Refer to Dr.Caramel magayato ,,,,,
Class Agnatha
by the gill slits