EXPLANATION OF HOW BIG PANDA EVOLVE OVER THE YEARS?

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en español

Los pandas gigantes y los distantemente relacionados pandas rojos desarrollaron independientemente un “dedo” adicional —un falso pulgar— a través, aparentemente, de cambios en los mismos genes.

Las dos especies comparten un antepasado común que vivió hace más de 40 millones de años. Los pandas gigantes (Ailuropoda melanoleuca) son parientes lejanos de los otros osos, mientras que los pandas rojos (Ailurus fulgens) están más estrechamente relacionados con los hurones. Ambas especies subsisten con una dieta compuesta casi en su totalidad de bambú, gracias a la ayuda de un dedo falso.

Explanation:

Giant pandas and the distantly related red pandas independently developed an additional "finger" - a false thumb - apparently through changes in the same genes.

The two species share a common ancestor that lived more than 40 million years ago. Giant pandas (Ailuropoda melanoleuca) are distant relatives of the other bears, while red pandas (Ailurus fulgens) are more closely related to ferrets. Both species subsist on a diet composed almost entirely of bamboo, thanks to the help of a false finger.

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.