Virus that live in plant bodies are called plant virus. For example- TMV, CMV, BYV (Bean Yellow Virus).

1. Plant virus or phytoviruses: Virus that live in plant bodies are called plant virus. For example- TMV, CMV, BYV (Bean Yellow Virus).
2. Animal Virus or Zoo-phages: Virus that live in animal bodies are called animal virus. For example, vaccinia, HIV, novel corona virus etc.
3. Bacteriophages: Viruses that reside in the body of bacteria and multiply by destroying bacterial cells are called bacteriophages. Like- T2, T4, T6, T8 etc.
4. Cyanophages: Virus that attack cyanobacteria are called cyanophages. In 1963 Safferman and Morris discovered cyanophages. Eg Microphages, LPP1, LPP2 (L=Lyngbya, P=Plectonema, P=Phormidium), AS-1, N-1 etc.
5. Microphages: Virus that attack fungi are called microphages. For example – PsV-S (Penicillium).

Virus whose nucleic acid core is made up of RNA are called RNA virus. Viral RNA can be single-stranded or double-stranded.
Single-stranded RNA virus: Dengue, polio, mumps, TMV, HIV and rabies virus.
Double-stranded RNA virus: Virus of the family Reoviridae. Rio virus, rice dwarf virus, retro virus etc.

Virus whose nucleic acid core is made up of DNA are called DNA virus. Virus DNA can be single-stranded or double-stranded.
Single-stranded DNA virus: ϕX174 and M13 coliphage viruses of the family Parvoviridae.
Double-stranded DNA virus: vaccinia, variola, adenoherpes simplex, T2, TIV (Tipula Iridescent Virus) etc.

1. DNA Virus: Virus whose nucleic acid core is made up of DNA are called DNA virus. Virus DNA can be single-stranded or double-stranded.
Single-stranded DNA virus: ϕX174 and M13 coliphage virus of the family Parvoviridae.
Double-stranded DNA virus: vaccinia, variola, adenoherpes simplex, T2, TIV (Tipula Iridescent Virus) etc.
2. RNA Virus: Virus whose nucleic acid core is made up of RNA are called RNA virus. Viral RNA can be single-stranded or double-stranded.
Single-stranded RNA virus: Dengue, polio, mumps, TMV, HIV and rabies virus.
Double-stranded RNA virus: Virus of the family Reoviridae. Rio virus, rice dwarf virus, retro virus etc.

They look like cylinders. For example, Ebola virus, pea streak virus etc.

They look like thin threads. For example – Dwarf virus of wheat, Streak virus of pea. Dr. Siddiq Publications

These virus look like eggs. For example, influenza virus

All these virus have a head and tail like a frog. Their head is 95×65 nm and tail is 110×25 nm. Like- T2,T4,T6,T8 etc.

All these virus are cubic in appearance. Their size is 100-350 nm. For example, vaccinia virus, herpes virus, wart virus, adenovirus etc. Dr. Siddiq Publications