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Cerrena [4.2K]
3 years ago
11

How many cells are present after 80mins

Biology
2 answers:
Rama09 [41]3 years ago
8 0
16cells according to my knowledge
frutty [35]3 years ago
4 0

There are about 16 cells present after 80mins.

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A student properly flames her loop but then forgets to let it cool. Instead, she immediately inserts the hot loop into her broth
kvv77 [185]

Answer:

Aerosols may be created when the hot loop touches the culture.

Explanation:

The insertion of the hot loop, will make the broth and the bacteria to boil briefly, and this will create aerosols containing bacteria.

This is very dangerous especially to the students , because the aerosols created is air borne and can be inhaled by the student and enter the respiratory tract, or settle on his/her skin.

Note that, when a loop produce a hissing sound when placed in a broth culture means that, it has not cooled sufficiently or as expected.

7 0
3 years ago
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Marysya12 [62]
A) heat is related to speed/ energy of molecules so when it is decreased the molecules slow down and stop bouncing around/ loose energy
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2 years ago
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For one month Siera calculated her home town’s average high temperature in degrees Fahrenheit. She wants to convert that tempera
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This representates the temperature of F degrees Fahrenheit converted to degrees Celsius. Remember that in order to change temperature we need to use the following formula:  <span>from Fahrenheit to Celsius: first subtract 32, then multiply by 100/180</span>
4 0
2 years ago
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Which of the following sentence best describes a buffer? Buffers resist change in pH of solutions by neutralizing excess acid or
Marianna [84]
It's the first one where it resist change in pH solutions by neutralizing :)
5 0
3 years ago
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Help me pleaseeeee!!
DochEvi [55]

Answer:

POLLUTANT, SOURCE AND IMPACT

Carbon Monoxide

SOURCE:- carbon monoxide main sources are from our homes, eg; wood stoves and fire place, generators, gas stoves, kerosene heaters, leaking chimneys, tobacco smokes etc

IMPACT:- carbon monoxide can cause organ failure as it reduces the amount of oxygen the hemoglobin been carried in the red blood cells to this organs in our body.

Carbon dioxide

SOURCE:- carbon dioxide can be from both human and natural source. Example of the sources includes; natural source ( ocean release, decomposition and respiration), human activities ( burning of coal, oil and natural gas, cement production etc)

IMPACT:- carbon dioxide causes difficulties in breathing as it displaces oxygen in the air.

It also increase the greenhouse effect (global warming) as more heat energy gets trapped by the atmosphere causing the planet to become warmer.

Sulphur dioxide

SOURCE:- sulphur dioxide mainly occur due to human activities such as fossil fuel combustion at industrial facilities, in ships etc.

IMPACT:- Sulphur oxide has been linked to many health effect and diseases such as cardiovascular diseases. It also causes respiratory problems, asphlegm and asthma attacks, irritation of lungs, throat and nose as well.

Nitrogen oxides

SOURCES:- nitrogen oxides also comes from human activities such as; combustion of fossil fuel, making of nitric acid, refining metals as well as petrols, explosive, food manufacturing etc.

IMPACT:- Nitrogen oxides has also been linked to many respiratory health issues such as bronchitis and wheezing. It causes the lining of the lungs to inflame there by reduce the immunity of the lungs to respiratory diseases.

Methane

SOURCE:- methane can be from either natural or human activities. The natural source includes; food digestion by cattles, decay of organic materials. Human activities such as waste management, rice production, oil and gas production etc.

IMPACT:- Methane is considered a green house gas like carbon dioxide, it contributes to the trapping of heat energy in the atmosphere which causes global warming. It is also linked to serious health issues such cardiovascular, respiratory and neurological problems.

Particulates

SOURCE:- particulates are fine tiny particles of matter found in the air, it might be in solid or liquid form. Example; dust, smoke, fumes etc. This particles can suspended in the air for an extended periods of time.

IMPACT:- exposure to particulates can cause variety of respiratory health problems such as difficulties in breathing, coughing, lungs and heart problem etc.

7 0
3 years ago
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