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Artemon [7]
3 years ago
5

I have involvement in the immune system

Biology
1 answer:
kherson [118]3 years ago
5 0
Good for you, it's hard to get a job nowadays
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Explain how scientist might use a Dichotomas key/chart
Komok [63]

Answer:

A dichotomous key is a tool created by scientists to help scientists and laypeople identify objects and organisms. ... Dichotomous keys are very useful because they allow non-expert users to identify organisms by directing them to look at the known, important organisms.

4 0
3 years ago
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Where does mechanical breakdown of food occurs?
Verizon [17]
There are lots of location that mechanical digestion occurs. But 2 common locations of mechanical breakdown of food (or physical digestion) occur in the mouth and in the duodenum. 

Mechanical breakdown of food does not require enzymes, which is different from chemical digestion. Usually, the main function of mechanical digestion is to help speed up the chemical digestion later, usually by increasing the surface area of the food. 

In the mouth, we chew the food. This can help increase the amount of surface area of the food we ate so that later on, the chemical digestion that requires enzymes such as amylase or protease will speed up. More enzymes can contact the food. 

In duodenum, bile that are produced from the liver helps emulsify fats and lipids into small oil droplets. Again, this action can also help increase the surface area of the lipids so that the digestion of lipids with enzyme lipase would be more efficient. Note that bile is important because only enzyme lipase can digest lipids in the duodenum, so if bile is not produced, fats are hardly digested.

Other types of mechanical digestion may include the churning in stomach, or the squeezing of food in the oesophagus (peristalsis). 
6 0
3 years ago
How do you determine the amount of electrons and protons?
Kamila [148]

Answer:

The number of protons in the nucleus of an atom is equal to the atomic number

the number of electrons in a neutral atom is equal to the number of protons

Explanation:

5 0
3 years ago
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Does anyone kowns the answer to theses questions? any help will do
WITCHER [35]
The handling and movement of controlled substances is Regulated by the DEA (Drug enforcement administration)
One of the main task of the drug enforcement administration is to combating drug smuggling and use within the United states. Hope this helps
4 0
3 years ago
At the official announcement of completion of the draft human genome (choose all that apply)
In-s [12.5K]

Answer:

  • (B) Two alternative strategies were used to complete the genome - top down and bottom up
  • (C) The public project used a mapping strategy to limit the total sequencing required
  • (D) The Celera group, led by Craig Venter, used a shot gun sequencing strategy

Explanation:

  • As the project was unable to sequence all the DNA that was found in the human cells, the first draft was <u>made in June and complete in the end referred to as a working draft and made on the basis of the final sequencing and mapping of the human genome. </u>
  • The <u>draft included the alternative strategies for the completion of the bottom up and top up of the genome code and has a mapping strategy</u> that limited the total sequencing needs.
7 0
3 years ago
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