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jok3333 [9.3K]
3 years ago
14

is Earth an open system or closed system? Explain your answer and provide at least one example that occurred during the Precambr

ian era
Biology
1 answer:
Ivan3 years ago
3 0

Answer:

The Earth is essentially a closed system; it obtains lots of energy from the Sun but the exchange of matter with the outside is almost zero. Isolated systems can exchange neither energy nor matter with an outside system.

The Precambrian was originally defined as the era that predated the emergence of life in the Cambrian Period. It is now known, however, that life on Earth began by the early Archean and that fossilized organisms became more and more abundant throughout Precambrian time.

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Cellulose, chitin, and peptidoglycan function as structural molecules and withstand pulling and pushing forces well. which struc
V125BC [204]

Cellulose, chitin, and peptidoglycan are all considered as carbohydrates. Now in the molecular level of these carbohydrates, structural polysaccharides exist as sets of long, parallel strands that are linked to one another. Due to this arrangement, pulling and pushing forces are being withstand.

4 0
3 years ago
Describe an experiment to investigate the effect of training on subjects ability to run faster without respire get anaerobically
Zinaida [17]
A runner HAS to use the anaerobic respiration process,first we need to know the difference between anaerobic respiration and aeorobic respiration 

<span>Anaerobic respiration is done by burning glucose directly without the presence of oxygen giving out lactic acid and energy </span>
<span>Aerobic respiration is done by burning glucose and oxygen giving out water + engergy + Co2 </span>

<span>1.) Take a stop-watch </span>
<span>2.) Take TWO or more runners </span>
<span>3.) Unlike Olympic race match ask ONE of the runners to run their fastes and the others to GRADUALLY speed up </span>
<span>4.) make the runners breath hard for air </span>
<span>5.) after finish line </span>
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<span>7.) check the concerntration </span>
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5 0
3 years ago
Bill Nye Science guy genes answers help plz
hram777 [196]

Answer:

I need the whole page

Explanation:

5 0
3 years ago
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How many different genotypes are possible from a cross between the parents RRYy and rrYY?
guapka [62]

Answer:

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2 years ago
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Whole body respiration reflects the process of cellular respiration that takes place in the ________ .
Mars2501 [29]

Answer: cell

Whole body respiration reflects the process of cellular respiration that takes place in the cell.

Explanation:

Cellular respiration is defined as the oxidation of organic food substances within the cell leading to the release of energy, carbon dioxide and water.

It can be represented by the equation:

C6H12O6 + 6O2 --> 6H2O + 6CO2 + Energy (in form of ATP)

Thus, the main purpose of cellular respiration that takes place in a cell is to generate energy required by the whole body.

4 0
3 years ago
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