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RideAnS [48]
3 years ago
11

The uppermost horizon, horizon O, in this profile is composed mostly of _________, while the lower horizon, horizon C, is compos

ed mostly of _______.
A) silt; gravel.
B) gravel; rocks.
C) organic matter; rocks.
D) top soil; organic matter.
Biology
2 answers:
ivanzaharov [21]3 years ago
4 0

c is the correct answer

pickupchik [31]3 years ago
3 0

<u>Answer;</u>

C) organic matter; rocks.

The uppermost horizon, horizon O, in this profile is composed mostly of <u>organic matter</u>, while the lower horizon, horizon C, is composed mostly of <u>rocks.</u>

<u>Explanation;</u>

-Soil contains the following major horizons, that is A B and C. Some soils may have horizon O, which may be thin or thick or even lack in some soils. This O horizon is found at the surface of many soils and normally contains organic materials at various decomposition stages. these are materials such as plants, leaves and bugs.

-C horizon is the layer that is below the B horizon. It contains larger weathered fragments or broken up-bedrock.

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34kurt

Answer

Complex barrier to the flow of substances out of the cells,and restrictions to inflow of unwanted substances into the cells. The hydrophobic and hydrophilic nature of the cell membrane controls the entry of substances from the extracellular medium into the intracellualr. In addition the polarity restricts certain substance movement across the walls.

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Explanation:

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3 years ago
Changing one base in a gene could have the most direct effect on the ?
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4 0
3 years ago
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What was the second organism to be found here on planet Earth?

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7 0
2 years ago
Read 2 more answers
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grandymaker [24]

Answer:

The given statement is false.

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4 0
3 years ago
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Zielflug [23.3K]

Answer:

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Explanation:

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Therefore during successful prenatal development, a human baby begins as a zygote and finally develops into a fetus. So the correct answer is D.

8 0
3 years ago
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