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Lesechka [4]
3 years ago
7

3. The main source of organic matter in soil is A bacteria B fung c plants water

Biology
1 answer:
Andrew [12]3 years ago
4 0
On farms the main sources of organic matter are plant litter (plant roots, stubble, leaves, mulch) and animal manures. Earthworms and microorganisms decompose these materials. The process of decomposition releases nutrients which can be taken up by plant roots.
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Visible sunspots vary in number according to a cycle of how many years?
Alchen [17]
Generally, the sun observes a solar cycle of eleven years. In this cycle, there are fluctuations in the activity, such as the ejected levels of solar radiation, and in the appearance of the sun, such as changes in the amount and size of sun spots, solar flares and other phenomena that occur on the sun's surface.
These changes also affect phenomena on earth, especially the auroras. 
4 0
3 years ago
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Which statement describes the most likely organ match?
julsineya [31]
An identical twin I think
6 0
3 years ago
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Analyze the graph with a partner. How many mass extinctions did you identify? How did you determine when they occurred?
Scilla [17]

Answer:

4 mass extinctions

Explanation:

as there are huge drops in the graphs

at 440,390,260,50

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6 0
3 years ago
In an element's square on the periodic table, the number with the greatest numerical value represents the
Goshia [24]

In the square of an element on the periodic table, the number with the highest numerical value represents the atomic number.

  • atomic number.

<h3>What is the atomic number Z?</h3>

The atomic number is represented by the letter Z and indicates the number of protons (p) in the nucleus of the atom. This quantity is characteristic of each chemical element.

With this information, we can conclude that The atomic number, represented by the capital letter Z, corresponds to the number of protons in the nucleus of atoms (Z = p).

Learn more about atomic number in brainly.com/question/8834373

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3 0
2 years ago
Pea seed color exists as green or yellow. We might say that "yellow" is an example of a (an)_ for seed color
LiRa [457]

Answer:

b. allele

Explanation:

An allele is a variant form of a gene. In this problem, there is one gene (that determines seed color) with two possible alleles (green and yellow).

<u>The other options are wrong because:</u>

The genotype is the combination of alleles an individual has.

The karyotype is an individual's collection of chromosomes, paired and ordered.

A homozygote individual has the same alleles for a particular gene.

A heterozygote individual has different alleles for a particular gene.

6 0
3 years ago
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