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3 years ago

The first life on Earth was very likely - celled,

Biology

1 answer:

Mashcka [7]3 years ago

4 0

Answer:

prokaryotes

Explanation:

prokaryotes where the earliest life forms ,simple creatures that fed on carbon compounds that were accumulating an Earth's early.slowly other organisms evolve that use the sun's energy along with compounds such as sulfides to generate their own energy.

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Advantage of fruits and vegetable

Olenka [21]

The fruits and vegetables have clear advantages compared to other synthetic and unhealthy foods. Fruits and vegetables supplies the necessary vitamins and minerals needed by the body to combat everyday stress. It also contributes to the strengthening of the immune system in order to avoid infections and diseases.

5 0

4 years ago

The process of photosynthesis can be represented by the chemical formula

lakkis [162]

Answer:

Photosynthesis is defined as the process by which plants make their own food in the presence of sunlight by utilizing water and carbon dioxide and produces energy.

The whole of process of photosynthesis can be represented by the following chemical formula:

6CO2 + 6H2O + sunlight energy = C6H12O6 + 6O2

CO2 - carbon dioxide

H2O - Water

C6H12O6 - Glucose

O2 - Oxygen

During photosynthesis glucose is formed from water and carbon dioxide and produces energy which is further converted into pyruvate that releases adenosine triphosphate (ATP) through cellular respiration. Oxygen is also formed.

The process takes place in two sequential stages Light dependent reactions and light-independent reactions.

7 0

3 years ago

Which two statements describe how the bodies of most multicellular living things are organized?

Nikolay [14]

I believe it is C and D

6 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

Explain how oxygen enters your body and is used. Make sure you mention the organs used, chambers of the heart and in which direc

gladu [14]

Oxygen enters your body through your mouth, then it goes to your lungs.

4 0

3 years ago