viruses are considered parasites (obligate parasites) because they cannot exist on their own. they need the host cell's machinery to reproduce so they cannot "survive" (technically not living) outside the cell.
They are called obligate intracellular parasites because they must use a host cell's amino acids to synthesize proteins, metabolic enzymes and pathways to obtain energy, ribosomes to synthesize proteins, and nucleotides for transcription and replication. In other words, they need to use just about everything from a host cell in order to survive.
Skin protects the inside of the body from bacteria. If it weren't for skin, we would get infections way too easily and certainly would not be able to survive. Not only just bacteria, but from viruses, parasites, and fungi too. A substance called melanin protects your skin from burns.
no bacteria is larger than viruses
viruses can be helpful because, some viruses can be used for cures. for example, USA. researcher suggest that adeno-associated viruses type 2 can Promises to be a breakthrough in cancer therapy
a virologist studies viruses
Parasites can carry and transmit viruses, but they do not "cause" them.
Viruses
No; viruses are sub-Cellular 'virons', while parasites are frequently multi-cellular organisms.
bacteria, viruses, fungi and parasites
They both destroy the cells that they attack.
Immunity
Because viruses can not reproduce or produce protein without a host cell
no. . . Because parasites and viruses can only grow on living matters... There may be saprophytes and bacteria growing in your food. . . Even parasites and viruses can be there but can not grow. .
bacteria. viruses. fungi. protozoa .(protists). parasites.
the only thing viruses have in common with them is that they move
No; leeches aren't vectors of dog true parasites but they can still infect them with other microorganisms like viruses.
Tapeworms, fleas, leeches, and most viruses, and some bacteria all fall under the label of parasites. Parasites benefit from another organism at that organism's expense.