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Is the following sentence true or false most viruses are so small that they can be seen?
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Bacteria were first seen in 1683 but viruses were not seen until 1938why?
Viruses were too small to be seen in a microscope so they were not identified till the 1930s.
Can Viruses be seen with a light microscope.?
Viruses are too small to be seen directly with a light microscope.Can be seen when it's examined under an electron microscope
Why must an election microscope be used to see a viruses?
Because Viruses are very small... Even smaller than bacteria... They are so small that they cannot be seen by any ordinary light microscope ! hence You Need To Use An Electron Microscope!
Why did scientists start studying viruses?
Scientists began to study viruses because they had found a factor that was smaller than bacteria but could still cause diseases. This factor came to be known as a virus. At that time, they didn't have the technology to see viruses. But they wanted to know if viruses were very small cells or simply non-living groups of molecules.
Peyer's patches are found in the submucosa of the distal end of the small intestine?
false
Most cells can be seen only with a microscope tool that magnifies small objectsIs this sentence true or false?
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Is it true or false that Leeuwenhoek's observed every type of microbe except protozoa and viruses?
Viruses are very small and can be considered ultramicroscopic. We were not able to see them with the best light microscopes as we could bacteria (prokaryotes). We have to use an electron microscope to see them as they are that small. This was not available until recently. Leeuwenhoek's microscope was not strong enough to see such small things.
Is rhis sentence true or false lava cools quicklyand forms minerals with small crystals?
It is true that lava cools quickly and forms minerals with small crystals.
What shape is a virus?
The shape of viruses varies greatly. They can be shaped like small balls (spherical viruses) like strands of spaghetti (flexous viruses) rigid rods, like bullets (baciliform viruses) and like geometric shapes (isocohedral viruses) The smallest viruses can be as small as 20nm (20/1,000,000 of a mm) to as much as 2,000 nm for some flexous plant viruses.
What microorganisms are very small and aren't made of cells?
because they arn't as complex as a human cell
Why did Robert Hooke's not include viruses in his book?
Viruses are too small, and can't be seen in an optic microscope.
Did leeuwenhoek observe protoza and viruses?
Viruses are too small for van Leeuwenhoek to have seen with his simple microscope.
Is this true or false plucking can move only small stones?
False it breaks up small rocks then picks it up...
What small proteins are secreted when tissue is invaded by viruses?
Interferon
The small intestine is the main organ of digestive system true or false?
False
What is a sentence for mementos?
You could use it in the following way: "She took a napkin from the restaurant as a memento of their first date".
Why weren't viruses discovered until about 1935?
The very small size of virus particles was a major limiting factor of the discovery of viruses.
