(02.04 hc)list an example of how an ecosystem can be affected by weather patterns. explain how ocean temperatures affect weather patterns.

An ecosystem is defined as the group of biological community in which the organisms interacts with the physical environment. They are mainly of two types, such as- the terrestrial ecosystem and the aquatic ecosystem. This two are further subdivided into different types.

These ecosystems are directly related to the weather and climatic conditions. A change in the weather or climate pattern will directly have an impact on the organisms that lives in these ecosystem.

For example, the freshwater ecosystem is rich in a variety of aquatic species. In a region where there is sufficient rainfall and temperature, there the organisms will exists without any difficulties. But, if the temperature in that area increases rapidly and there occurs heavy rainfall, then these river waters will spread in every possible direction due to their higher flow rate, resulting in flood and affecting the aquatic species. So the weather plays an important role in controlling the ecosystem.

The earth is comprised of nearly 70% of water bodies that includes the oceans, seas, rivers and lakes. This oceans in the equatorial region receives maximum amount of sunlight, due to which the area becomes warm and forms a low pressure zone, resulting in heavy rainfall. Whereas, towards the higher latitudes, these ocean water remains relatively cold. So the warm air from the equatorial region are carried towards the poles in order to maintain the equilibrium, resulting in various types of weather patterns.

transcription is a process in which information is rewritten. it is something our cells must do, in a more specialized and narrowly defined way. in biology, transcription is the process of copying out the dna sequence of a gene in the similar alphabet of rna. it needs to happen in the nucleus because that's where the dna is. dna is always inside the nucleus unless the cell is dividing.

transcription is the first step in gene expression, which involves copying a gene's dna sequence to make an rna molecule. transcription is performed by rna polymerases. it has three stages: initiation, elongation, and termination. rna molecules must be processed after transcription in eukaryotes.

explanation:

long version:

the protein synthesis consists two processes which are, transcription and translation. transcription takes place in the nucleus. it uses dna as a template to make an rna molecule. rna then leaves the nucleus and goes to a ribosome in the cytoplasm, where translation occurs. transcription is the first part of the central dogma of molecular biology: dna → rna. it is the transfer of genetic instructions in dna to messenger rna (mrna). during transcription, a strand of mrna is made that is complementary to a strand of dna.  

these three stages are:

  initiation: in which   is the beginning of transcription.occuring when the enzyme rna polymerase binds to a region of a gene called the promoter. this signals the dna to unwind so the enzyme can ‘‘read’’ the bases in one of the dna strands. the enzyme is now ready to make a strand of mrna with a complementary sequence of bases.

    elongation: in which is the addition of nucleotides to the mrna strand. rna polymerase reads the unwound dna strand and builds the mrna molecule, using complementary base pairs. there is a brief time during this process when the newly formed rna is bound to the unwound dna. during this process, an adenine (a) in the dna binds to an uracil (u) in the rna.

    termination: in which is the ending of transcription, and occurs when rna polymerase crosses a stop (termination) sequence in the gene. the mrna strand is complete, and it detaches from dna.