yes
Thousands of viruses can fill one cell, either eurokaryotic of prokaryotic.
This is a very vauge question. While most "germs" are smaller than skin cells (viruses and smaller bacteria) some bacteria can be larger than skin cells. Though most aren't larger than white blood cells, the body's defenders.
A cell nucleus would be smaller than a cell because a cell nucleus is inside the cell, so it has to fit inside.
An atom is smaller than a cell, and a molecule is smaller than both atoms and cells. Cells are composed of molecules, which in turn are made up of atoms.
Viruses
Bacteria are single-celled organisms that can be seen under a microscope, while viruses are smaller and can only be seen using an electron microscope. Bacteria can reproduce on their own, while viruses need to infect a host cell to replicate. Additionally, antibiotics can treat bacterial infections, but not viral infections.
There are many things: 1 Organelles like ribosomes or vacuoles that are inside tha cell 2 Viruses 3 Molecules 4 Atoms that make up molecules 5 Electrons That are part of atoms 6 protons that are also part of atoms There might be more that i dont know about
Subcellular structures such as organelles (e.g. mitochondria, ribosomes) are smaller than a cell. Molecules like proteins, lipids, and DNA are even smaller components found within cells. At an even smaller scale, atoms and subatomic particles make up these molecules.
Viruses are acellular; they are not composed of a cell, and therefore are not alive. Bacteria are composed of a single cell and therefore are considered living.Viruses are very much smaller around 10x than the average bacteria and are composed of little more than DNA or RNA (retro-viruses ex HIV) and a protective cover. Bacteria are prokaryotes meaning they have no membrane bound cellular organs but are more complex in structure than the virus.Viruses replicate by invasion of a host cell integrating it's DNA/RNA into the host and having the host translate protein products to create new viruses which rupture through the cell wall of the host often stealing a membrane from the host in the process. This means all viruses must reproduce on/in something alive(biotic).Bacteria reproduce by cell division. Bacteria do not have to have biotics to reproduce, they can reproduce in any suitable environment where growth is not limited.I know that they are different because viruses are 10,000 times smaller than bacteria, antiboitics cannot kill viruses like they kill bacteria, and viruses need a living host to reproduce when bacteria produces on its own by binary fission.
The first cell did not come from a preexisting cell and viruses
Yes, viruses are generally smaller than ribosomes. Most viruses range in size from about 20 to 300 nanometers, while ribosomes are typically around 20 to 30 nanometers in diameter for bacterial ribosomes and can be larger in eukaryotic cells. This size difference makes viruses one of the smallest infectious agents compared to cellular structures like ribosomes.
One cell does it all. Breath, Eat, Excrete, Grow and Reproduce. One cell. Smaller than anything we can see unaided.