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Hitman42 [59]
3 years ago
12

Why are gram positive bacteria resistant to the effect of membrane attack complex (MAC)? ​

Biology
1 answer:
elena-s [515]3 years ago
8 0
Don’t click the link it’s some kind or tracking I did it don’t do it
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A large section of the lower troposphere with uniform temperature and humidity is called _______.
Lilit [14]

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D. an air mass

Explanation:

5 0
3 years ago
Which of the following actions acts to warm a homeothermic body?
uranmaximum [27]
Shivering

Explanation: shivering action is an act to warm a homoeothermic body. Sweating makes the body cool, panting don’t keep body warm and dilating blood vessels does not keep body warm instead constriction of blood vessels is the initial process to conserve body heat followed by waves of muscle contraction, which is nothing but shivering. Alteration of the set point in torpor is also not the right answer
4 0
3 years ago
The half life of C14 is 5730 years. I have a sample that I dug up from a sea cucumber fossil. I expected .00015ppm of C14 in my
Tju [1.3M]

Answer:

The answer is 17190 years

Explanation:

Original amount was 5730. To become 1/8 of the original amount, three (3)  half life periods will demand because after first half life the amount will become 1/2 and after second half life, amount become 1/2 again (1/2 x 1/2 = 1/4).  Third half life, the amount become half 1/2 again (1/2 x 1/2 x 1/2 = 1/8).

For the 3 half life periods we have original amount x numbers of half life periods = 5730 years x 3   =  17190 years

8 0
3 years ago
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