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marysya [2.9K]
3 years ago
10

What is the reason that a modern electron microscope (TEM) can resolve biological images to the subnanometer level, as opposed t

o tens of nanometers achievable for the best super-resolution light microscope?
a.the focal length of the electron microscope is significantly longerb.contrast is enhanced by staining with atoms of heavy metalc.electron beams have much shorter wavelengths than visible lightd.the electron microscope has a much greater ratio of image size to real size
Biology
1 answer:
Alex Ar [27]3 years ago
8 0

Answer:

C. Electron beams have much shorter wavelengths than visible light

Explanation:

A beam of electrons is used to illuminate and create magnified images of specimens in an electron microscope. The resolution of a microscope increases with a decrease in the wavelength of the light it uses for illumination. The wavelength of electrons used in the electron microscope is about 100,000 times shorter than that of visible light. Therefore electron microscopes have a resolution thousand times better than the light microscope.

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Which of the following exposure factors will produce the greatest receptor exposure?
earnstyle [38]

400 mA, 70 ms is the following exposure factors will produce the greatest receptor exposure.

C: 400 mA, 70 ms

<u>Explanation:</u>

As SID builds, the introduction rate diminishes and receptor presentation diminishes. SID and the mAs required to keep up the introduction to the IR have a straightforwardly corresponding relationship (as the SID builds, the mAs required to keep up presentation to the IR increments by a corresponding sum).

An expanded SID likewise decreases amplification (size twisting). The most extreme SID ought to be utilized when conceivable to limit amplification. Infrequently, however, the SID can be purposefully diminished for amplification. SID influences size yet not shape twisting.

3 0
3 years ago
Difference between Squamous epithelium and Stratified epithelium. (Pls answer quick) ​
Simora [160]

Answer:

squamous epithelium consists of a single layer of flat cells. It is found in lungs,heart and blood vessels.It allows the movement of materials across it.

stratified epithelium has many layer of flat cells.It is present in lining of oesophagus and mouth and also over the skin

8 0
3 years ago
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If two orange heliodors have a child, what is the probability their child would be red?
Stels [109]

Answer:

25% or 1/4

Explanation:

The gene for colour in Heliodors is controlled by two contrasting alleles that codes for Red (R) and Yellow (Y) colours. However, these two alleles exhibit incomplete dominance, which is a phenomenon whereby a combination of both alleles gives rise to a third intermediate phenotype that is a blending of the other two parental phenotypes. In this case, both colours gives rise to a heterozygous Orange coloration (RY) in Heliodors.

However, if two orange Heliodors (RY) are crossed, four possible offsprings will be produced with the genotypes: RR, RY, RY, YY. This shows a phenotypic ratio of 1 red: 2orange: 1yellow. Hence, the probability of having a child with red coloration is 1 out of 4 possible offsprings i.e. 1/4.

Expressing this in percentage, we have 1/4 × 100 = 25%.

8 0
3 years ago
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SpyIntel [72]

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How are observation and experimentation related?
Dominik [7]
You can gather information from both actions.
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3 years ago
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