A major breakthrough in the studies of cells came with the development of electron microscope. This is because:
- the resolution power of the electron microscope is much higher than that of the light microscope
- the resolving power of the electron microscope is 200 – 350 nm as compared to 0.1 – 0.2 nm for the light microscope
- electron beam can pass through thick materials, whereas light microscopy requires thin sections
- the electron microscope is more powerful than the light microscope as it uses a beam of electrons which has wavelength much longer than that of photons
The Correct Option is A
Solution and Explanation
The electron microscope has a significantly higher resolution compared to the light microscope, allowing researchers to visualize much smaller structures and details within cells. This increased resolution is due to the shorter wavelength of electrons compared to photons (light), which enables the electron microscope to distinguish finer structural features.
So, the correct option is (A): the resolution power of the electron microscope is much higher than that of the light microscope.
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Concepts Used:
Evolution
Evolution is a process that occurs in changes in the genetic content of a population over time. Evolutionary change is generally classified into two: microevolution and macroevolution. The process of changes in allele frequencies in a population over time is a microevolutionary process. Three main mechanisms that cause allele frequency change are natural selection, genetic drift, and gene flow. On the other hand, macroevolution refers to change at or above the level of the species.