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nadezda [96]
3 years ago
11

What is the key organism that ensures the nitrogen cycle can run properly?

Biology
1 answer:
Zarrin [17]3 years ago
7 0

Answer:

the nitrogen fixing bacteria is an important organims in the nitrogen cycle which helps .in fixing the nitrogen into the soil  

Explanation:

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Alexander Litvinenko was poisoned with 10 micrograms of the radioactive substance Polonium-210. Since radioactive decay follows
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Answer:

Left amount of Polonium-210 after 115 days will be 4.5927 microgram

Explanation:

We have given initial mass of Polonium-210 N_0=10microgram

Decay rate x= 0.502% = 0.00502

Time t = 115 days

We have to find the left amount of Polonium -210 after 115 days

We know that left amount is given by

N=N_0e^{-xt}=10e^{-0.00502\times 115}=4.5927microgram

So left amount of Polonium-210 after 115 days will be 4.5927 microgram

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In a certain population of red squirrele, a mutation causes several squirrels to
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After several generations, this trait is likely to be much more  common because individuals with the trait will have a greater  chance of passing it on to their offspring,

Explanation:

It would later turn to what is termed as germline mutation which are mutations passed from parent to offspring, as time progresses the trait would be more and increases the chance of being transferred to their offspring

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The endosymbiotic theory describes how a large host cell and ingested bacteria could easily become dependent  on one another for survival

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