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iragen [17]
3 years ago
8

What order of events may have led to the rise of the cells ​

Biology
1 answer:
harina [27]3 years ago
3 0
What are the events ? Please elaborate;-;
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As the temperature of a star is increased, what happens to the wavelength?
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The wavelengths gets bigger
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SSSSS [86.1K]
I believe the order is...

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What are the three examples to justify Newton first law of motion .​
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1. A book sitting on top of a table
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All of the following protect the skin and mucous membranes from infection except
leva [86]

The question is incomplete. Th ecomplete question is as following:

All of the following protect the skin and mucous membranes from infection EXCEPT  

A) multiple layers of cells.

B) tears.

C) saliva.

D) HCl.

E) the "ciliary escalator."

Answer: D) HCl.

Explanation:

  • The epidermis, the outer layer of the skin provides waterproofing and serves as a barrier to infection and other laers also sustain any type of injury.  
  • Tears wash out foreign bodies which enter the eye. In addition, tears contain a substance called lysozyme which has an antibacterial function and works to prevent microbial invasion and infection.  
  • Saliva protects against infection, especially via the innate immune system. This mechanism is an important first-line protection against bacterial and viral infection
  • The mucociliar escalator is within the conducting airways and is composed of mucus and cilia that transfer the mucus up and out of the lungs where it can be removed by coughing or swallowing,

Whereas HCL helps in the digestion process.

Hence, the correct option is D.

5 0
3 years ago
What is action potential in psychology?
seropon [69]

Answer:

An action potential is part of the process that occurs during the firing of a neuron. During the action potential, part of the neural membrane opens to allow positively charged ions inside the cell and negatively charged ions out. ... This electrical impulse is carried down the nerve through a series of action potentials.

Explanation:

3 0
2 years ago
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