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Gelneren [198K]
2 years ago
15

The main difference between sub-soil and topsoil is

Biology
1 answer:
anyanavicka [17]2 years ago
6 0

Answer:

C. top soil has more organic matter.

Explanation:

It's more fertile than subsoil, due to having more organic matter and because fertilizers are usually added to the topsoil only.

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What two substances are the ingredients of cellular respiration and the products of photosynthesis?
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Answer: Photosynthesis converts carbon dioxide and water into oxygen and glucose. Glucose is used as food by the plant and oxygen is a by-product. Cellular respiration converts oxygen and glucose into water and carbon dioxide. Water and carbon dioxide are by- products and ATP is energy that is transformed from the process.

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8 0
3 years ago
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Stored energy is called energy, and movement is called energy.
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Kinetic is movement and potential is stored energy
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3 years ago
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Contractions of the heart generate blood pressure, which is responsible for moving blood through the blood vessels.
malfutka [58]

The contractions of the heart is what creates out blood to pulse through out body and is the basis of our blood pressure; which means this statement is TRUE.


The systolic number (top) of the blood pressure is our heart physically pushing the blood out of the heart and to the rest of the body.

The diastolic number (bottom) of the blood pressure our heart at rest when it has just finished with one pump.

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3 years ago
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The Hershey and Chase experiments involved the preparation of two different types of radioactively labeled phage. Which of the f
Vlad1618 [11]

Answer:

B. It was necessary that each of the two phage components, DNA and protein, be identifiable upon recovery at the end of the experiment.

Explanation:

Hershey and Martha Chase used radiolabeled the DNA of some of the bacteriophage cells with phosphorus (32P). They radiolabeled the sulfur (35S) of the coat protein in the second batch of the phage cells. They infected some of the bacterial cells with phage having radiolabeled DNA while the other <em>E. coli</em> cells were infected with the phage carrying radiolabeled coat protein. This allowed the clear identification of the radiolabelled molecule (DNA or protein) present in the host cell.

They observed that the <em>E. coli </em>cells infected with phage having radiolabeled DNA exhibited the radioactivity while the other batch of the host cell did not show it.  

6 0
3 years ago
Explain how the parts of a
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Answer: Meristems contribute to both primary (taller/longer) and secondary (wider) growth. Explanation: Primary growth is controlled by root apical meristems or shoot apical meristems, while secondary growth is controlled by the two lateral meristems, called the vascular cambium and the cork cambium.

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