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Ipatiy [6.2K]
3 years ago
13

Which of the following best explains how a scanning electron microscope is used to produce an image of a specimen? An electron b

eam strikes the specimen, is absorbed by the specimen, and used to produce an electrically charged image on a screen. An electron beam passes over the specimen’s surface and displaces electrons, which are then focused on a screen to form an image. An electron beam traces an outline of the specimen onto a screen, and reflected electrons are collected to form the rest of the image. An electron beam travels through the specimen, and as it does so it burns an image of the specimen on a screen.
Biology
2 answers:
victus00 [196]3 years ago
8 0

The correct answer is B) An electron beam passes over the specimen's surface and displaces electrons, which are then focused on a screen to form an image.

torisob [31]3 years ago
8 0

Answer: An electron beam passes over the specimen's surface and displaces electrons, which then focused on a screen to form an image.

A scanning electron microscope is a microscope which studies the surface characteristics of the specimen. It focuses an electron beam over a surface of the specimen to create an image. Electron beam supplied by scanning electron microscope interact with the surface of the specimen. The reflected electrons also known as back scattered electrons are collected to create image on the screen.

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You are studying transplant rejection in a wild and genetically diverse population of mice. You have captured some of the mice f
Snowcat [4.5K]

Answer:

b. skin from mouse 2

Explanation:

According to this question, a mice skin transplant is being conducted. Four mice labelled Mouse 1, Mouse 2, Mouse 3 and Mouse 4 are used for this experiment. A small patch of skin from mouse 2 (the donor) was transplanted onto mouse 1 (the recipient), however, it was eventually rejected by the recipient (mouse 1).

This transplant rejection is due to the fact that the recipient's immune system identifies the tansplanted skin as foreign, hence, begins to attack it, leading to the skin's necrosis or death. Based on this, the same transplant rejection will occur if skin patches from mouse 3 and 4 are used.

However, the immune system of mouse 1, which is the recipient, will identify skin patches from MOUSE 2 as less foreign than any other skin from other mice. This is because skin from that mouse has been used before, hence, the recipient's immune recognizes it when a follow-up transplant is conducted. This makes a follow-up transplant from MOUSE 2 be the least likely to be rejected.

3 0
3 years ago
What are the responsibilities of the region of the brain highlighted below?
spayn [35]

That part of the brain is specifically used for expressing language, so I would say "<u>Controlling voluntary body movements, processing information from sense organs, thoughts, and learning abilities.</u>" Is the answer. It's known as the Bronca's Area.

5 0
3 years ago
Read 2 more answers
50 points HELP!!
ASHA 777 [7]

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4 0
3 years ago
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What are the two main differences between capillaries in the periphery and capillaries surrounding the brain
Lorico [155]

Answer:

The options are not given but they are gotten from another websites.

A. Capillaries surrounding the brain have no pores and are surrounded by membranes of astrocyte cells.

B. Capillaries surrounding the brain have pores and are surrounded by membranes of astrocyte cells.

C. Capillaries surrounding the brain have no pores and are not surrounded by membranes of astrocyte cells.

D. Capillaries surrounding the brain have pores and are not surrounded by membranes of astrocyte cells.

The correct answer is option A.

Capillaries surrounding the brain have no pores and are surrounded by membranes of astrocyte cells.

Explanation:

Capillaries surrounding the brain have no pores and are surrounded by membranes of astrocyte cells because

Capillaries are tiny blood vessels in the circulatory system that connect aterioles to venules. They are the most abundant or they are much blood vessels. They can penetrate the tissues of the body which allow passage of food nutrients, oxygen in the body thereby allowing exchange of nutrients and oxygen between the body tissues and the blood.

Capillaries surrounding the brain have no pores and are surrounded by membranes of astrocyte cells while capillaries in the periphery Capillaries surrounding the brain have pores and are not surrounded by membranes of astrocyte cells.

8 0
3 years ago
How are volcanoes and wind similar?
guapka [62]

Answer:

They both can be constructive forces.

Both volcano's and wind can shape the landscape... volcano's using eruptions and lava, wind using wind erosion when it gets "windy"

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3 years ago
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