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Oksana_A [137]
2 years ago
9

On a construction site, a worker moves some debris and a bulldozer moves a different pile of debris Which of these best explains

how the worker and the bulldozer are alike?
Choose the correct answer

Their physical properties are similar

They are both systems that are performing similar functions

They both use the same kind of fuel to provide them with energy

O They have control centers that are made from the same components
Biology
1 answer:
bonufazy [111]2 years ago
8 0

Answer:

The correct answer is - they are both systems that are performing similar functions.

Explanation:

In the given question there are two different entities that do a similar kind of work or perform similar functions, however, the systems are different as one system involves the manpower of a worker whereas the other system involves the high power of a bulldozer.

The work is similar but the amount of the work varies as manual work done by a worker is less in comparison to the bulldozer.

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Limestone is a rock formed from calcite. Calcite can be easily dissolved by acids. Marble is a rock formed from limestone. There
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Answer:

All of these are correct

Explanation:

According to the question, marble is a rock formed from limestone, which in turn is also formed from Calcite. This shows that marble is a kind of metamorphic rock because a metamorphic rock is any rock that is formed by the alteration of other rocks caused by heat, pressure or chemicals etc. These changes that occurs in the previously existing rocks are called METAMORPHOSIS.

Hence, since marble is formed from limestone, it concludes that marble is a metamorphosed rock formed from a previously existing limestone rock. Also, since Calcite, a precursor of limestone that marble is formed from can be degraded by acids, both limestone and marble which are formed from it will also be dissolvable by acids.

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Explanation:

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Oxygen and nutrients from the mother's blood are transferred across the placenta to the fetus through the umbilical cord. This enriched blood flows through the umbilical vein toward the baby's liver. There it moves through a shunt called the ductus venosus. This allows some of the blood to go to the liver.

A small amount of the blood continues on to the lungs. Most of this blood is shunted through the ductus arteriosus to the descending aorta. This blood then enters the umbilical arteries and flows into the placenta. The oxygen rich blood then returns to the fetus via the third vessel in the umbilical cord (umbilical vein). The oxygen rich blood that enters the fetus passes through the fetal liver and enters the right side of the heart.

To learn more about umbilical vein , here

brainly.com/question/1232134

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