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Are electron microscopes good for watching cells grow?
Yes, electron microscopes can be used to watch cells grow, as they provide high-resolution imaging capabilities that can capture the intricate details of cellular structures. However, electron microscopy may require special sample preparation techniques that could affect the living cells, so it is important to carefully consider the experimental design. Alternatively, techniques like live cell imaging with fluorescence microscopy may be more suitable for observing the dynamics of cell growth in real-time.
What structure could you see in the Elodea cells?
In Elodea cells, you could see structures such as the cell wall, cell membrane, chloroplasts (containing chlorophyll for photosynthesis), and a central vacuole. These structures are typical of plant cells and contribute to their function in photosynthesis and support.
Why were the scientists not able to observe most of the cell organelles before 1940?
Before 1940, scientists were limited in their ability to observe most cell organelles due to the lack of advanced microscopy techniques. Light microscopes, which were primarily used at the time, could not resolve structures smaller than about 200 nanometers, making it difficult to see many organelles. The development of electron microscopy in the 1940s allowed researchers to visualize cellular components at much higher resolutions, revealing the complex structures of organelles that were previously unseen.
What structures could a cellular organism use to move through its environment?
Cellular organisms can use structures like flagella, cilia, and pseudopodia to move through their environment. Flagella are long, whip-like structures that propel cells forward, cilia are shorter hair-like structures that help with movement or feeding, and pseudopodia are temporary extensions of the cell membrane that amoeboid cells use for crawling and engulfing food.
What cause scientsist to discover the existence of cells?
The discovery of cells was made possible due to advancements in microscopy in the 17th century. Scientists like Robert Hooke and Antonie van Leeuwenhoek were able to observe and describe cells for the first time, leading to the development of cell theory by Matthias Schleiden and Theodor Schwann.
Are electron microscopes good for watching cells grow?
Yes, electron microscopes can be used to watch cells grow, as they provide high-resolution imaging capabilities that can capture the intricate details of cellular structures. However, electron microscopy may require special sample preparation techniques that could affect the living cells, so it is important to carefully consider the experimental design. Alternatively, techniques like live cell imaging with fluorescence microscopy may be more suitable for observing the dynamics of cell growth in real-time.
How could a scientist examine a cell?
A scientist can examine a cell using various techniques such as light microscopy, electron microscopy, immunofluorescence microscopy, or molecular techniques like PCR and sequencing. These methods allow scientists to visualize the structure, composition, and behavior of cells at different levels of detail.
What structure could you see in the Elodea cells?
In Elodea cells, you could see structures such as the cell wall, cell membrane, chloroplasts (containing chlorophyll for photosynthesis), and a central vacuole. These structures are typical of plant cells and contribute to their function in photosynthesis and support.
What is a root world for cyto?
A root world for "cyto" could be "cyt" which relates to cells or cellular structures.
Why were the scientists not able to able to observe most of the cell organelles before 1940?
Before 1940, scientists did not have access to advanced microscopy techniques that could penetrate deep into cells to observe organelles. The technology at that time had limited resolution and magnification, making it difficult to visualize small structures within cells. Additionally, many organelles are transparent or similar in density to the surrounding cytoplasm, making them challenging to distinguish without specialized staining methods.
Why direct microscopy and plate count give not a same counts?
Direct microscopy counts viable and non-viable cells, whereas plate count only counts viable cells that are able to grow and form colonies on agar plates. Additionally, plate count may underestimate the total number of viable cells due to factors like the inability of certain cell types to grow under specific conditions or the formation of aggregated cells that do not separate easily on the agar plate.
Why were the scientists not able to observe most of the cell organelles before 1940?
Before 1940, scientists were limited in their ability to observe most cell organelles due to the lack of advanced microscopy techniques. Light microscopes, which were primarily used at the time, could not resolve structures smaller than about 200 nanometers, making it difficult to see many organelles. The development of electron microscopy in the 1940s allowed researchers to visualize cellular components at much higher resolutions, revealing the complex structures of organelles that were previously unseen.
In which situation would new technology be most likely to cause a change in an existing theory about new structures a cell?
New technology would be most likely to cause a change in an existing theory about cell structures if it enables scientists to visualize and study cellular components at a much higher resolution or in real-time, revealing previously unknown structures or functions. For example, advancements in super-resolution microscopy or single-cell imaging techniques could lead to the discovery of novel organelles or interactions within cells, necessitating a revision of existing theories about cell structure and function.
What structures could a cellular organism use to move through its environment?
Cellular organisms can use structures like flagella, cilia, and pseudopodia to move through their environment. Flagella are long, whip-like structures that propel cells forward, cilia are shorter hair-like structures that help with movement or feeding, and pseudopodia are temporary extensions of the cell membrane that amoeboid cells use for crawling and engulfing food.
Which microscope would be MOST useful for examining the contours of the surface of a bacteria cell?
It depends on the type of biofilm, what surface the biofilm is on, and what information you want to get by looking at the biofilm under a microscope. If you just want to look at how much of a surface is covered by a biofilm, you can use normal light trasmission microscopy (as long as the surface is transparent e.g. glass). Alternatively you could use epifluorescent microscopy in combination with a fluorescent stain. If you want to look at the structure of the biofilm, confocal laser scanning microscopy is probably the best as you can get a 3D image. Other useful types of microscopy include phase contrast and DIC, which allow you to look at the biofilm without staining it first.
What cause scientsist to discover the existence of cells?
The discovery of cells was made possible due to advancements in microscopy in the 17th century. Scientists like Robert Hooke and Antonie van Leeuwenhoek were able to observe and describe cells for the first time, leading to the development of cell theory by Matthias Schleiden and Theodor Schwann.
How could you develop a procedure to identify cancerous tissue by counting the number of cells undergoing mitosis?
To develop a procedure to identify cancerous tissue based on the number of cells undergoing mitosis, you could obtain a tissue sample, stain it to highlight mitotic cells, and then count the number of cells undergoing mitosis per unit area using a microscope. An increased number of cells undergoing mitosis may indicate abnormal cell proliferation characteristic of cancer. Further validation through histological analysis and comparison with healthy tissue samples would be necessary to confirm the presence of cancer.
