Compound microscope
<h3>
Further explanation</h3>
In 1665, Robert Hooke used a compound microscope to observe cells. Hooke observes the cell walls of dead plants (in the form of cork) when they appear under a microscope. He named it the cell because it looked similar to a cellula or small room inhabited by monks.
Development of microscopy:
- 1590: Hans and Zacharias Janssen, as Dutch lens grinders, mounted two lenses in a tube to produce the first compound microscope.
- 1660: Robert Hooke published <em>Micrographia</em>, containing detailed observations of biological materials made with the best compound microscope.
- 1676: Anton van Leeuwenhoek was the first person to observe a live cell under a microscope, i.e., the algae Spirogyra.
- 1931: Ernst Ruska constructed the first electron microscope. With the invention of the electron microscope, many infectious agents smaller than bacteria could be seen.
Until now, we can see how important the use of microscopes, especially in microbiology, that is the study of microorganisms.
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Keywords: compound microscope, Robert Hooke, cells first observed, cork, dead plant, walls, Anton van Leeuwenhoek
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According to the research, the correct option is Most of the water that falls on the continents is derived from the oceans. It is true about the hydrological cycle.
<h3>What is the
hydrological cycle?</h3>
It is the water cycle that allows water to pass from the earth's surface to the atmosphere so that it can then return to its liquid and solid phases. .
In this process, therefore, sublimation, evaporation and transpiration play an essential role where 70% of the earth's surface is covered by liquid water, of which 97% is salt water that forms the oceans.
Therefore, we can conclude that according to the research, the correct option is Most of the water that falls on the continents is derived from the oceans. It is true about the hydrological cycle.
Learn more about the hydrological cycle here: brainly.com/question/20309198
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DNA is the basic unit of inheritance
A gene is the basic physical and functional unit of heredity. Genes are made up of DNA. Some genes act as instructions to make molecules called proteins.