Because, it is too small to see with the naked eye.
Prokaryotic cells are smaller and lack a nucleus and other membrane-bound organelles, making them difficult to see with the naked eye. A microscope is necessary to magnify and visualize these tiny organisms, allowing for detailed observation of their structure and characteristics.
we need microscope to see unicellular organism because they are very small
Because these organisms are too smaller to be observed directly.
Liquids and gases expand inside a vacuum, so the organism's shape would be destroyed..
If you need a microscope to see a human then yes, otherwise no.
Yes. One celled or unicellular organisms are so small you would need a strong microscope to see one.
Organism that have one cell (single celled) are so small, you would need a microscope to see them. So, orchids are multicellular.
Prokaryotic organisms are very small, typically ranging from 0.2 to 2 micrometers in size. They lack a defined nucleus and other membrane-bound organelles, making them difficult to see with the naked eye. A microscope is needed to magnify their size and observe their structures, such as cell walls, membranes, and flagella.
Depends, optic microscopes don't see much smaller than a nucleus very well, organelles such as mitochondria are seen as specks if you have a good microscope. To see more detail, you need an electron microscope (transmission or scanning), with which you can even see objects as small as viruses.
Because, it is too small to see with the naked eye.
To see particles, such as individual cells or microorganisms, you would typically need a light microscope. However, to see smaller particles like viruses or nanoparticles, you would need an electron microscope.
To calculate the size of the organism, you would need to know the magnification of the microscope being used. Comparing the field diameter at 400x magnification with the actual size of the organism would give you the scale factor to determine the organism's size. For example, if the field diameter at 400x is 0.5 mm, and the actual size is 50 micrometers, then the organism is 10 times smaller than the field diameter.