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Degger [83]
3 years ago
8

Use the information you learned about carbon-based molecules to explain a human's need to participate in the biogeochemical cycl

es.
Biology
2 answers:
inn [45]3 years ago
7 0

Answer:

Human releases carbon dioxide during respiration and also certain activities performed by him  lead to generation of carbon which at some stage become the part of biogeochemical cycle.

Explanation:

Carbon is an elementary part of all living beings and thus is found in almost all the living organism and human as an evolved species has the ability to take in oxygen and release carbon dioxide.  

This released carbon dioxide enters into the biogeochemical cycles (predominantly the carbon cycle) and get converted into useful form again after going through a cyclical process via various biotic and abiotic stages.  

Also certain human activities like burning of fossil fuels, wood etc also releases carbon based product such as carbon di-oxide, carbon mono-oxide etc, . These products from unnatural process also become part of biogeochemical cycle.  

OLga [1]3 years ago
5 0

Biogeochemicle cycles are the pathways by which a chemical substances (carbon, nitrogen, oxygen, phosphorus) moves through biotic (biosphere) and abiotic (lithosphere, atmosphere, and hydrosphere) compartments.

Organic carbon is found in all land-living organisms,, as well as soils in form of the calcium carbonate. Plants and animals(including humans) utilize carbon to produce carbohydrates, fats, and proteins, which are then be used to build their internal structures or to obtain energy. Carbon is released into the air through the processes of respiration in a form of CO2.

The negatively human impact on the carbon cycle is through direct emissions from burning fossil fuels (transfer of carbon from the geosphere into the atmosphere) or through the process of calcination of limestone for clinker production, which releases CO2.  


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Which of these statements best explains why the star chart does not show the exact locations of the sun and planets?
Romashka [77]

Answer:

Stars do not emit sufficient light to help locate them accurately in the night sky. The revolution of Earth makes the sun and the planets move on the ecliptic with respect to the stars.

Explanation:

Rotation and revolution causes changes in star charts. When the Earth rotates, move a way from the sun and when you have rotated far enough it will be nights and you will observe stars but as the seasons changes you will see different stars because u will change to different position. The revolution of the Earth make the stars and sun move ecliptic.

4 0
3 years ago
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Are RNAs processed before translation is able to occur in Prokaryotes? Do only mRNAs undergo processing and maturation in Eukary
raketka [301]

Answer: RNAs are not processed before translation in prokaryotes, this process only takes place in eukaryotes.

Explanation:

Messenger RNA or mRNA is a single-straded ribonucleic acid that transfers the genetic information from the DNA (deoxyribonucleic acid) molecule of the cell nucleus to a ribosome (which are the machinery responsible for protein synthesis) in the cytoplasm. mRNA determines the order in which the amino acids of a protein will be joined and acts as a template or pattern for the synthesis of that protein. To accomplish this, the DNA molecule must be transcribed into an RNA molecule, which is used for protein synthesis.

The messenger RNA obtained after transcription is known as primary transcribed RNA or precursor RNA or pre-mRNA, which in most cases is not released from the transcription complex in a fully active form, but in eukaryotes it must undergo modifications before it can perform its function (RNA processing or maturation). These modifications include:

  • Elimination of fragments (splicing): In most cases, the <u>mRNA undergoes the removal of internal, non-coding sequences called introns, and the connection of exons. This does not occur in prokaryotic cells</u>, as they do not have introns in their DNA.
  • Protection by CAP: <u>Addition to the 5' end of the structure called "cap" or "capping"</u>, which is a modified guanine nucleotide, 7-methylguanosine triphosphate, via a 5'-5' triphosphate linkage, instead of the usual 3',5'-phosphodiester linkage. This cap is necessary for the normal RNA translation process and to maintain its stability.
  • Polyadenylation signal: <u>Addition to the 3' end of a poly-A tail, a long polyadenylate sequence, whose bases are all adenine</u>. Its addition is mediated by a sequence or polyadenylation signal (AAAAAA), located 11-30 nucleotides upstream of the original 3' end. This tail protects the mRNA from degradation, and increases its half-life in the cytosol, so that more protein can be synthesized.

The mature mRNA (in eukaryotes) is transferred to the cytosol of the cell through pores in the nuclear envelope. Once in the cytoplasm, ribosomes are coupled to the mRNA. However, in prokaryotes, ribosome binding occurs while the mRNA strand is being synthesized. After a certain amount of time, the mRNA is degraded into its component nucleotides by ribonucleases. So, the transcription and translation processes are carried out in a similar way as in eukaryotic cells but they occur simultaneously. But, the fundamental difference is that, in prokaryotes, the messenger RNA does not undergo a maturation process and, therefore, no cap or tail is added and no introns are removed. Moreover, it does not have to leave the nucleus as in eukaryotes, because in prokaryotic cells there is no defined nucleus.

So, RNAs are not processed before translation in prokaryotes, this process only takes place in eukaryotes.

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It was proposed by a scientist named Charles Darwin.
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I am sure that the answer is D
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A nurse in a child health clinic is obtaining the health history of a 5-year-old boy who was just found to have type 1 diabetes.
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The nurse should anticipate with the child that has type 1 diabetes that the child couldn’t provide diabetic care to self as he is still young, it is best to assist the child into providing diabetic medication. It is best to manage the child and make sure to be gentle when applying treatment for children are sensitive in situations involving medicinal treatment.

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