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2 years ago

How does matter move through an ecosystem

Biology

1 answer:

Rudik [331]2 years ago

4 0

Matter is recycled within and between ecosystems through biogeochemical cycles.

Hope this helps

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A cell with a predominance of rough endoplasmic reticulum is most likely ________. a cell with a predominance of rough endoplasm

amid [387]

The answer to this question would be: producing large quantities of proteins for secretion.

A cell with many rough endoplasmic reticulum has a high protein synthesis capability. This will make the cell able to produce many proteins like enzyme. One example of this type of cell will be pancreas cells. This cell will need many enzymes to digest food that you eat so it will need many ER to produce it.

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1 year ago

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Which of the following statements best describes the relationship between the themes of “place” and “human-environment interacti

Pavlova-9 [17]

I think the correct answer from the choices listed above is option A. The relationship between the themes of “place” and “human-environment interaction” is that the characteristics of “place” include things like economic activity, architecture, and culture, all of which are human elements that alter or can be influenced by the environment.

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2 years ago

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If 32 packed volume units of cells are separated from 46 volume units of plasma from a blood sample, the haematocrit is _______

nordsb [41]

Answer:

If 32 packed volume units of cells are separated from 46 volume units of plasma from a blood sample, the hematocrit is 41,02% percent. The hematocrit value is within the normal range.

Explanation:

Hello!

Hematocrit (or packed cell volume -PCV-)is defined as the percentage of red blood cells (vol%) in a blood sample. One common method of determining it is by centrifuging a heparinized blood sample in a capillary tube at 10 000 RPM for five minutes. This separates the blood sample in two layers, formed elements (RBC and WBC) and Plasma.

The length of the layers is directly measured from the tube and represents the volume of packed cells and plasma. Since the number of white cells is negligible compared to the number of red cells, the formed elements are considered to represent the red blood cells.

The hematocrit can be calculated as the volume of packed cells divided by the total volume of the blood sample.

$\frac{PCV}{TOTAL(pcv+plasma} * 100$

In the question:

$\frac{32}{32+46} * 100$ = $\frac{32}{78} * 100$ = 41,02%

In humans the normal hematocrit range is 40,7% to 50,3% for men and 36,1% to 44,3%. Taking these reference values into consideration, this sample is within the normal range.

I hope you have a SUPER day!

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2 years ago

The graph shows the rates of malignant melanoma for the years 1973–2004.

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Melanoma is a type of the skin cancer which is the most serious. A melanoma can spread and put the person at more risk. The data shown in the graph regarding the skin cancer between the years 1973-2004 shows an increase in melanoma cases in both men and women. However, this increase occurred at much more faster rate in men than in women according to the graph.

Hence, the answer is 'Skin cancer increased at a faster rate in men than in women'.

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2 years ago

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This weather map shows a stationary front. What kind of weather is MOST LIKELY to occur at the location seen in this weather map

AnnyKZ [126]

I believe the answer is D. don't take my word for it though I may be wrong

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2 years ago

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