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olchik [2.2K]
3 years ago
14

Why is it important to avoid planting the same crop in the same field year after year

Biology
1 answer:
4vir4ik [10]3 years ago
6 0
Planting the same crop in the same place each year zaps nutrients from the earth and leaves soil weak and unable to support healthy plant growth. Because soil structure and quality is so poor, farmers are forced to use chemical fertilizers to encourage plant growth and fruit production.
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Shalnov [3]

Answer:

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Explanation:

3 0
3 years ago
Energy ______ takes place within cells
Diano4ka-milaya [45]

Answer: Respiration

Explanation:

Respiration is the process of chemical energy stored in food which occurs through various enzyme controlled reactions. Some of the energy generated is stored as adenosine triphosphate (ATP) Hence, chemical energy from food is converted to chemical energy in the cell which the cell stores as ATP

8 0
3 years ago
how many dna molecules would there be after four rounds of pcr if the initial reaction mixture contained two molecules?
Marat540 [252]
  1. Answer: 32 molecules of DNA would be after four PCR if the initial reaction mixture contained two molecules
  • After 'n' rounds of the polymerase chain reaction, it is feasible to produce 2 n DNA molecules from a single DNA template molecule (PCR). Therefore, 2 to the power 4  = 16 DNA molecules will be produced after 4 PCR cycles
  • If two molecules are doubled four times, 32 DNA molecules are created.

Explanation:

The PCR method is what?

The highly sensitive PCR method enables quick DNA amplification of a particular section. Using visual methods based on size and charge, PCR may detect and identify gene sequences by producing billions of copies of a certain DNA fragment or gene.

What does a PCR have to accomplish?

A given DNA segment can be quickly multiplied (amplified) into millions or billions of copies using the polymerase chain reaction (abbreviated PCR), allowing for more in-depth analysis.

What are the three main PCR steps?

For any DNA synthesis reaction, there are only three easy stages that must be completed: First, the template is denaturated into single strands. Next, primers are annealed to each original strand to synthesise new DNA strands. Finally, the new DNA strands are extended from the primers.

To know more about PCR visit :

https://brainly.in/question/6129406

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5 0
1 year ago
Many naturally occurring environmental exposures increase risk for cancer. Residents in many parts of North America are exposed
Katena32 [7]

Answer:

RADON GAS

Explanation:

Radon is a naturally occurring gas, which is produced due to the radioactive decay of the Radium element. It is one of the dense gas that is mostly concentrated in the lower portion of the houses, and are trapped in the cracks and fractures of the walls of houses and buildings.

Radon gas is an invisible, colorless and odorless gas, which is a very harmful gas, and exposure to Radon gas can cause an individual to suffer from cancer.

In recent studies, it has been found that in many parts of North America, a large number of residents are exposed to Radon gas, which led to an increased risk of cancer.

7 0
3 years ago
When gametes combine to form a zygote, the chromosomes number of the zygote is now referred to as
pychu [463]

Answer:

When gametes combine to form a zygote, the chromosomes number of the zygote is now referred to as <u>diploid</u>.

Explanation:

The term diploid refers to the complete chromosome charge of a cell, in this case a somatic cell. Sex cells, or gametes, contain only half of the chromosome charge that each parent confers on their offspring, and are called haploid cells.

<em>Two gametes, haploids, each contribute their half of the chromosome charge to form a </em><em>diploid</em><em> cell, the </em><em>zygote</em><em>.</em>

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Learn more:

Diploid - haploid brainly.com/question/7212380

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4 0
3 years ago
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