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Sunny_sXe [5.5K]
3 years ago
14

What are several defenses that keep pathogens from getting inside the body

Biology
1 answer:
lawyer [7]3 years ago
8 0

Answer:

The body has two lines of natural defense to protect against infection. The first are physical barriers, such as the skin, body secretions and mucous membranes. The second line of defense is the immune system. Specialized immune cells coordinate and execute attacks to kill germs that make it past the body's physical barriers.

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Question 25
Blizzard [7]
<h2>Answer:</h2>

Generally, <u>D) non-metals are gases</u> which are at room temperature.

<h2>Explanation:</h2>

Those metals which lack the property of the metal are called as non-metal. Usually they are characterized by the following features:

  • Nonmetals don't conduct electricity through them.
  • Nonmetals don't allow heat to pass through them.
  • They don't show ductility and malleability.
  • The nonmetals not only include gases but there are some solids which do not exhibit the above mentioned characters are also nonmetals. Some of the solid nonmetals includes graphite, carbon, wood, and so on.

Thus, from the above data, it can be inferred that option D which states that gases at room temperature is considered as most suitable answer for non-metals, as option A, B, and C are characteristic of metals.

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Explanation:

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How many different genes are coordinately regulated by the gal4 transcriptional activator?.
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