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gavmur [86]
3 years ago
8

What is the purpose of the biogeochemical cycles?

Biology
1 answer:
____ [38]3 years ago
3 0
A biogeochemical cycle<span> or substance turnover or cycling of substances is a pathway by which a chemical substance moves through biotic (biosphere) and abiotic (lithosphere, atmosphere, and hydrosphere) compartments of Earth.
.
i hope this helps
.
Zane</span>
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if a retrovirus could infect one of any of these kinds of cells, which would amplify it the most within the first 2 hours?
ryzh [129]

Cancer cells are the best target to amplify the most within first 2 hours. Highly oncogenic retroviruses are recombinants of viral and host genes.

Retroviruses are viruses with RNA rather than DNA in their genomes that infect cancer cells. Reverse transcriptase is an enzyme that is used to integrate into the DNA of the host cells. It is enhanced to a greater extent the more cell replication takes place. More retroviruses are then produced by the cell, infecting further cells. Many diseases, including AIDS and various types of cancer, are linked to retroviruses.

Low-incidence cancer-causing retroviruses lack inserted host information. Instead, it seems that they alter the expression of potentially carcinogenic host genes, which in turn results in cancer. Retroviruses incorporate proviral DNA into the chromosomal DNA of their host during the course of their regular life cycle. Integrations take place across numerous locations. Although most integrations are benign, some can cause cancer. Many of these seem to encode tyrosine phosphorylating protein kinases.

Learn more about Cancer here:

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4 0
1 year ago
Are viruses capable of photosynthesis?
Rama09 [41]

Explanation:

scientists have found that a virus can stimulate photosynthesis in bacterial host, so im guessing yes.

8 0
3 years ago
In nutrient-rich environments (like your mouth), bacteria can use the provided amino acids to synthesize their proteins. However
kirill115 [55]

Answer:

The correct answer will be option-A  

Explanation:

The citric acid cycle is the cyclic chain of reactions taking place as a phase of the cellular respiration as it gets halted in the absence of oxygen. The citric acid cycle converts the obtained acetyl-CoA to a usable form of energy in the form of ATP, NADH and FADH₂.

The citric acid cycle forms intermediates which are utilised by the organisms to synthesise the various biomolecules like amino acids, purines and pyrimidines.

The intermediates like alpha-ketoglutarate forms arginine, proline and glutamine whereas oxaloacetate forms asparagine and aspartate. If bacteria do not receive the amino acids then they will synthesise the amino acids using intermediates of the citric acid cycle.

Thus, option-A is the correct answer.

5 0
3 years ago
22. Explain how emission or absorption spectrum can be used to identify the composition of objects in space
densk [106]

Answer:

Identifying elements in astronomical objects using their spectra. Measuring the spectrum of light from a star can tell astronomers what the star is made up of. Since each element emits or absorbs light only at a particular wavelength astronomers can identify what element are in the stars from the lines in their spectra.

4 0
3 years ago
small group of mice were released on an island. The island previously had no mice on it, but had abundant food and no predators.
Illusion [34]

Answer:

Density-independent regulation

Explanation:

It is given that before the arrival of hurricane, the population of mice has stabilized.  

This means the rate of birth and deaths are approximately equal.  

But as the hurricane came, it disrupted this balance and would have led to a change in both the birth and death rates. This is termed as Density-independent regulation as abiotic factors and environmental factors have affected the birth and death rates

3 0
3 years ago
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