True about viroids is?
Viroids is a subviral agent that does not have an extracellular dormant ( virion) phase and has a genome that is much smaller than those of known viruses. REF:ANATHANARAYAN AND PANIKER'S TEXTBOOK OF MICROBIOLOGY 8TH EDITION PAGE NO:443
Cause tumors in animals
Lack envelope like covering
Have only genetic material
Visible on light microscope
Virology