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xxMikexx [17]
3 years ago
12

Crop rotation is a method of soil conservation because _______. a. the land produces more than one type of crop b. it requires p

lowing and tilling that reduces soil compaction c. it does not use the same parcel of land in sequential seasons d. it avoids the depletion of soil nutrients
Biology
2 answers:
katen-ka-za [31]3 years ago
5 0

Short answer:

I believe option D (all of the above) is correct.

Liula [17]3 years ago
3 0

Answer:

d. It avoids the depletion of soil nutrients.

Explanation:

Crop rotation is the process of planting different crops in the same area of land in rotation. This allows the breathing of the soil as well as the retention of nutrients in the soil.

<u>Crop rotation is one form of conserving soil as it helps in saving the nutrients of the soil from getting depleted.</u> As different crops require different nutrients, the change in crop plantation between different types of crops help in maintaining the fertility of the land. This way, when crops are planted in rotation, there is also the rotation of the different nutrients required for the different crops planted, thus allowing the cycle of nutrient change to take place.

Thus, the correct answer is option d.

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One mechanism by which viruses may cause cancer is to interrupt the genetic regulatory sequences of repressor proteins. Which of
Bumek [7]

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Explanation:

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Retroviruses which cause cancer at low incidence do not contain host information inserted. Rather, they tend to cause cancer via the expression mutation of potentially oncogenic host genes. Retroviruses incorporate proviral DNA into their host's chromosomal DNA during their natural life-cycle. Provirus DNA promoter affect regulatory gene expression over.

Hence, the correct option is D.

3 0
3 years ago
Katie wants to make ball-and-stick models of the four macromolecules. She has colored balls for each of the elements in these mo
viktelen [127]

Answer:

I don't really understand what the question is, but I'm pretty sure you're asking for which molecules that will be needed; Carbon, Hydrogen, Oxygen, Nitrogen, Phosphorus

Explanation:

-Carbohydrate consists mainly of Carbon, Hydrogen, Oxygen, simple sugars have the basic formula of (CH2O)n. Some modification can be made to the sugar, but the main formula consists only with Carbon, Hydrogen, Oxygen.

-Proteins consists mainly of Carbon, Hydrogen, Oxygen, and Nitrogen for the amide groups. Some amino acid will need Sulfur for it's R Group.

-Fats consists mainly of Carbon, Hydrogen, and Oxygen just like Glucose.

-Nucleic Acids consists mainly of Carbon, Hydrogen, Oxygen, Nitrogen, and Phosphorus for the backbone of the Nucleic Acid. Nitrogen will be needed for the Nitrogenous Base.

I hope this is the answer you're looking for!

6 0
3 years ago
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Answer:

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5 0
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