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Mrrafil [7]
3 years ago
12

Mucous membranes are quite thin and fragile. How can such delicate tissue provide defense against microbial invaders?

Biology
1 answer:
Paul [167]3 years ago
6 0

Answer:

The mucus physically traps microbes, contains a variety of antimicrobial chemicals, and is shed constantly, along with the outermost layer of cells.xplanation:

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NATURAL SELECTION is defined as, individuals that have certain inherited traits tend to survive and reproduce at higher rates be
aliina [53]

Answer:

True.

Explanation:

It is defined as, individuals that have certain inherited traits tend to survive and reproduce at higher rates because of these traits

Natural selection is defined as organisms developing inherited traits that better help them survive in their environment.

<em>Hope this is correct, have a great day!</em>

6 0
2 years ago
The mass of an electron is
vodka [1.7K]

Answer:

not significant to the overall mass of the atom

Explanation:

The mass number of an atom is the combination of the mass of the protons and neutrons.  Electrons are not included because their mass are so insignificant that is doesn't change the total mass much, therefore they are left out. The mass of an electron is about 1,830 times smaller than protons and neutrons.

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