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Burka [1]
3 years ago
15

After the three days, what happens in each test tube? why? what is necessary for rust to occur? how does this activity demonstra

te the fate of oxygen in earthâs early atmosphere, when iron in the oceans was still removing oxygen from the air?
Biology
1 answer:
Finger [1]3 years ago
4 0
The situation would be that, in a sealed tube,  there are 3 to 4 nails inside and a certain amount of calcium chloride was added. After three days, there will be no changes to be observed in the first tube since the oxygen is not enough to initiate a change and there is no presence of water. For the second test, the same situation is made but boiling water was filled in the tube. For this, no changes would still be observed since there is no moisture. For the last test, the same situation as the first but it is filled halfway with water. After 3 days, rust would be observed on the nails. In order for rust to happen, there should be water and oxygen. The oxygen in the early atmosphere of the Earth would react with iron present in the oceans thus producing iron ores.
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A particular type of cell doubles in number every hour. Write the function that can be used to find the number of cells present
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The function to represent the number of cells present at the end of h hours if there are initially 4 of these cells is n= 4(2)ˣ

Given,

A particular type of cell doubles in number every hour.

So, to determine which function can be used to find the number of cells present at the end of h hours if there are initially 4 of these cells.

The number of cells denoted with n.

Therefore, the number of bacteria after every hour will form a geometric series.

<h3>What is Geometric Progression?</h3>

Geometric Progression or geometric Sum of G.P. is refer to as if each term is a multiple of the next term then this sequence.  

aₙ =arˣ

Where a is the first term which is 4.

And r is the common ratio r = 2.

Therefore,

The number of cells present at the end of h hours if there are initially 4 of these cells is,

n = arˣ

n = 4(2)ˣ

Hence, the function represents the number of cells present at the end of h hours if there are initially 4 of these cells is n = 4(2)ˣ.

For more details regarding cell division, visit:

brainly.com/question/4365207

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