<prompt> True about viroids is?Cause tumors in animalsLack envelope like coveringHave only genetic materialVisible on light microscope  <response>: 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 PANIKERS TEXTBOOK OF MICROBIOLOGY 8TH EDITION PAGE NO:443 