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Ira Lisetskai [31]
4 years ago
11

A single cell undergoes Mitosis every 20 minutes. How many cells will be present after 2 hours?

Biology
1 answer:
ehidna [41]4 years ago
7 0
20mins: 2
40mins: 4
60mins: 8
80mins: 16
100mins: 32
120mins:64
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1 Control of the mosquito population helps manage outbreaks of _____.
guajiro [1.7K]

Answer:

1. Malaria

2. Polio

3. rabies

Explanation:

Hope I've helped

4 0
3 years ago
Humerus bones from the same species of animal have approximately the same length-to-width ratios. It is known that Species A has
Dima020 [189]

Answer:

The unearthed Humerous bones don't belong to the species A.

Explanation:

Hello!

You are studying the Humerus bones species A, who is known to have a mean ratio of 8,5. This value corresponds to the population mean of the length-to-with ratio of bones of species A, symbolized as μ.

The hypothesis you want to study is "The Humorous bones unearthed belong to the species A" if you assume this to be true, then the mean of the length-to-with ratio should be equal to the known population mean of the length-to-with ratio.

Symbolized:

H₀: μ = 8,5

H₁: μ ≠ 8,5

Significance level: α: 0,05

You are asked to use a Z-test, since you don't know the value of the population variance, but have the sample values, the sample size is big enough (more than n=30). Assuming that the sample values are independent, the statistic test of choice is the approximation:

Z= \frac{x_bar-μ}{S\sqrt[]{n} }≅N(0;1)

The critical region, in this case, it's a two-tailed test (remember the type is determined by the null hypothesis) so you'll have two critical values.

Left value [/tex]Z_{\alpha/2} = Z_{0,025} = -1,96

Right value Z_{1-\alpha/2} = Z_{0,975} = 1,96So you'll reject the null hyphotesis if the calculated [tex]Z_{obs} value is ≤-1,96 or ≥1,96 and you'll support it if -1,96<Z_{obs}<1,96

Now we calculate the statistic by replacing the formula with the data:

x_bar = 9,26

S = 1,20

n = 41

Z_{obs}= \frac{x_bar-μ}{S\sqrt[]{n} }

Z_{obs}= \frac{9,26-8,5}{1,20\sqrt[]{41} }

Z_{obs}= 4,0553

Since the calculated value falls in the rejection region, this means, you have statistically significant results. In other words you can reject the null hipothesis (H₀: μ = 8,5) and asume that the unearthed Humerous bones don't belong to the species A.

I hope you have a SUPER day!

7 0
3 years ago
Organisms that contain only one cell and do not contain a nucleus or membrane-bound organelles are known as
Mumz [18]

Answer: Prokaryotes

Explanation:

3 0
3 years ago
Red blood cells that are bathed in blood neither shrink nor swell and burst. If the concentration of blood is 0.5 M, what could
stich3 [128]
0.5. This is because if the cells have not swollen or shrunk then the water potential (and therefore amount of solute) inside and surrounding the cell must be equal.


5 0
3 years ago
Digestion begins in the: a : mouth b : stomach c : esophagus d : colon
Schach [20]
Digestion begins in the mouth. Saliva contains enzymes which begin to break down food. The mouth also uses the teeth and jaw to mechanically break down food.
8 0
3 years ago
Read 2 more answers
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