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Ierofanga [76]
3 years ago
12

Hey guys! I have a quick multiple choice question for you. 10 points!

Biology
2 answers:
ira [324]3 years ago
6 0
It is A hope this is helpful
Ierofanga [76]3 years ago
3 0

Answer:

A

Explanation:

i have to say A but im not sure this is hard

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Area measuring 5 m² contains 50 earthworms what is the population density of the earth worms
Darina [25.2K]

The density of a population of living organisms is usually measured in individuals on one square km. In here we have 50 earthworms on an area of 5 square meters, thus we have 10 earthworms on every square meter. In order to get to the result we need to see first how many square meters there are in one square km. One square km has one thousand meters of length and one thousand meters of width so:

1,000 x 1,000 = 1,000,000 km²

Since we established that we have 10 earthworms on every one square meter, we just need to multiply the number of square meters with the amount of earthworms on every square meter:

1,000,000 x 10 = 10,000,000

So we have a density of 10 million earthworms per square km.

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3 years ago
Which of the choices below is the parent cell for all formed elements of blood?
Ostrovityanka [42]

Answer:

The hemocytoblast  (option B) are the parent cell for all formed elements of blood

Explanation:

All blood cells are originated from a common stem cell, which is called a pluripotent stem cell. It is capable of giving rise to any of the blood cells maintaining its existence through mitosis. By dividing pluripotent stem cells, new cells are originated, which become multipotent and differentiate into lymphoid (NK cell and the polymorphonuclear cell) or myeloid cells (megakaryocite); always respecting the original quantity.

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3 years ago
What is the very first thing an analyst reaches for when they find a tool mark?
lys-0071 [83]

Answer: C. Their camera

Toolmarks are the impressions left by an object or tool on it's contact surface.   Toolmarks are searched and collected in a crime scene to relate a link with the tool which has created them. In crime scene investigation, toolmarks found in the scene of crime should be photographed by the analyst in close range, mid range and overview range shots in order to record it's original location, shape, size and number if multiple tool marks are present.


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3 years ago
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I'm assuming you meant pool instead of poolon, i'll take it as a grammatical error. Anyhow, the water in a pool on sunny days tend to have less chlorination then on regular days. This is because chlorine forms hypochlorite ions in the water, and these are broken down by the ultraviolet light from the sun. Rainy or shiny, the weather is always affecting the chemistry in your pool.

Now, if you want to get more complicated into it, you can add a stabilizer into the pool. The common one safely used in pools is cyanuric acid. This almost completley prevents all de-chloronification.

I hope this information was of any use to you.

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A plant can have green (G) or yellow (g) leaves. It can also have a long (K) or
vesna_86 [32]
Here ya go hoope this helps

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