“Un arquero en el momento que estira todo su cuerpo para atajar la pelota” En esta actividad no solamente es necesaria la materia y la energía. La relación con el medio exterior es vital. En milésimas de segundo ingresa, se procesa y egresa información del cuerpo del arquero.
Entonces, pensando en esta situación, determinen:
1 La señal o estímulo
2 Receptor del estímulo
3 Centro de procesamiento del estímulo y producción de una respuesta
4 Órganos que llevan a cabo la respuesta.

step 1: initiation

initiation is the beginning of transcription. it occurs 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.

step 2: elongation

elongation 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.

step 3: termination

termination 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.

meiosis is the correct answer

sex cells are usually half's then they find another half and make a fertilize egg