Subfamilies

Yup, that's the "common" characteristics of retroviruses....why I call it common??because there're three subfamilies of retroviruses: Oncovirus, Lentivirus and .....virus..(argh, I forgot the name)..poor me.. :( Why it does so? because according to Baltimore virus' classification, ...

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These are testate amoebas that are often split into several families or subfamilies because of their difference in form and texture of the test or shell. Locomotion is accomplished by protoplasmic flow or what is called ameboid movement, which is also exhibited ...

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