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Dafna11 [192]
3 years ago
15

When foreign material enters the body, one way the immune system responds is by

Biology
2 answers:
kondor19780726 [428]3 years ago
6 0
The Digestive System

: 3
Schach [20]3 years ago
3 0
Pathogens may enter you but there is a layer (almost like a wall) that they will have to get through first (in the skin) bacteria can also kill pathogens. The immune system will produce antibodies that will also kill off pathogens.
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icang [17]

Answer:

soil

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How much fertilizer is applied each year on lawns throughout the united states?
Stells [14]

Answer:

1.8 pounds  of Nitrogen per year; (based on 1000 square feet per application) for cool season grasses.

Explanation:

The above application shows  an average of 0.9 pounds of inorganic and organic  nitrogen per 1000 square feet per application . Therefore not more than 0.9 pounds of nitrogen will be needed  per application.And for a whole year 1.8 pounds of Nitrogen per year will be needed.

This calculation was based on 1000 per square.But most lawn are not 1000 per square, therefore calculation can be done using the 1000 per squares as the  reference point .

AMMONIA and its solutions, AMMONIUM NITRATE AND UREA  (which is organic source)<u>are the sources of this Nitrogen</u>.

Urea is non -explosive in nature and solid. However, ammonia and ammonium Nitrate are both explosive.

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3 years ago
Define adaptation. Why do organisms adapt? Give an example.
Karolina [17]

They adapt because they are forced to survive. An example would be certain animals gaining the ability to camouflage to protect themselves from predators.

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3 years ago
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recall from the video the steps of how to make a wet mount of cheek epithelial cells. place the steps of how to prepare a wet mo
romanna [79]
  • Place the scanning objective above the specimen by clicking it into place.
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<h3>What is epithelial cells ?</h3>

Epithelial cells are the cells that cover the inside and outside of your body's surfaces. They can be located on your skin, blood vessels, and organs such as your urinary tract.

<h3>What does it mean if my epithelial cells are high?</h3>

If urinalysis findings show a moderate or high number of epithelial cells, it may indicate the following medical conditions: Kidney illness Liver disease Yeast infections Urinary tract infections Certain kinds of cancer.

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1 year ago
In an experiment, a small dialysis bag is filled with a 20% salt solution. It is placed in a
Studentka2010 [4]

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The bag will get smaller

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Osmosis can be defined as the process of diffusion or movement of water molecules across a semipermeable membrane from an area of higher concentration of water (i.e., lower concentration solution) to a lower concentration of water. For example, in cells, there are specialized pores called 'aquaporins' which are membrane proteins that form channels to transport water molecules by facilitated diffusion. In this case, the outside of the bag has a higher salt concentration than inside, thereby water molecules will move by facilitated diffusion through pores from inside to outside the bag.

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