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Zepler [3.9K]
3 years ago
5

Please help me!!!!!!!

Biology
2 answers:
Svetradugi [14.3K]3 years ago
8 0
Bababoooiiii. Pickle
Ilya [14]3 years ago
5 0

Answer:

bababoi

Explanation:

bababoi

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About how many times does the moon orbit Earth in one year
Ivahew [28]

Answer:

The Moon completes a circle around the Earth in approximately 28 days.

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3 years ago
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Compare and contrast light microscopes, scanning electron microscopes, and transmission electron microscopes. Sort each statemen
podryga [215]

Answer:

<u>Light microscope</u>:

  • use a beam of light to produce magnified images
  • can be used to examine living cells and tissues

<u>Scanning electron microscope</u>:

  • use a beam of electrons to produce magnified images
  • can be used to examine DNA
  • can be used to examine cells

<u>Transmission electron microscope</u>:

  • use a beam of electrons to produce magnified images
  • can be used to examine DNA
  • can be used to examine cells

Explanation:

Light microscope: is a commonly used microscope also known as compound microscope. Magnifies images from 40X upto 1000X. It uses ray of visible light to produce a magnified image. The light microscope can be used to view specimen of both living and dead cells or tissues. However, it doesn't give a detailed view of a specimen like electron microscope.

Scanning electron microscope: It uses electron beam as an illuminating source. It has a much higher resolving power than light microscope because it uses electrons instead of light. It magnifies object upto 500000 times the actual size. Internal structures can also be viewed. However, only dead specimen can be used because the beam of electrons can kill the cells. They are of two types:

  1. <u>Scanning electron microscope(SEM): </u>an electron beam passes over the specimen's surface and displaces electrons which are then focused on  a screen to form an image. Images appear in 3-D
  2. <u>Transmission electron microscope: </u>electromagnets magnify the image by passing beam of electrons through a thin specimen. Images appear in 2-D

7 0
3 years ago
hematoma is an open injury that occurs whenever a large blood vessel is damaged and bleeds rapidly. TrueFalse You should never r
lisov135 [29]

Answer:

1. Hematoma is an open injury that occurs whenever a large blood vessel is damaged and bleeds rapidly. False

2. You should never remove an avulsion skin flap, regardless of its size. True

3. When possible, ALS providers should administer IV fluid within 3 minutes after the crushing object is lifted off the body. False

Explanation:

1. It is false because, although is true that a hematoma occurs when you have a large blood vessel damaged, i t is a closed injury, not an open one.

2. It is true, you should never remove an avulsion skin flap, regardless of its size. The avulsion may have a serious infection.

3. It is false  because ALS providers should administer IV fluid before the crushing object is lifted off the body.

3 0
3 years ago
The function of mitosis is
sergiy2304 [10]
Mitosis is a process where a single cell divides into two identical daughter cells (cell division). During mitosis one cell? divides once to form two identical cells. The major purpose of mitosis is for growth and to replace worn out cells.
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3 years ago
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What theory explains how identical mesosaur dinosaur fossils are found on two different continents, south america and africa?.
vagabundo [1.1K]

Answer:

pangea

Explanation:

once all of the world was connected and we call that pangea then over time the continental plates moved making the earth formation we know now. the theory is that could the dinosaurs have moved while pangea was still a thing.

5 0
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