With a light microscope one can view the nucleus and endoplasmic reticulum, large vacuoles etc
The resolution of a light microscope is dependent on the wavelength of light that is the main beam of illumination. Light has approximately 0.4 um (UV)- 0.7um (Infrared) wavelength. Organelles smaller than about 0.5 um will be difficult to discern with a light microscope.
With an electron microscope one can view, in addition, even the ribosomes and mitochondria, chromosomes, tubules etc.
An electron microscope can discern very minute details of a cell. This is because its resolution is dependent on the very small wavelength of a beam of electrons which is approximately 0.002 um (about 10,000 times powerful than a light microscope)
The correct answer is option ''The stethoscope was invented because the physician did not want to put his head on women's chests to listen to their heart and lungs''.
In this case, the problem was that the physician's had a problem in listening the heart beats and the lung sound of the woman. To overcome this problem, the stethoscope was invented to listen the heart beat and the lung sound from distance, without keeping head on women's chest.
Answer:
They provide energy, protection and insulation for the organs in the body. They're also very important in the cell membranes.
Explanation:
Answer:
Stem
Explanation:
Main Stem - Holds up the plant and carries water throughout the plant. Secondary Stem - A stem that grows out from the main stem and holds the leaves. Chlorophyll - The green matter that is needed to make food for the plant.