Una navalla amb fulla d’acer té un valor de duresa estimat en 6,5. Tenint això en compte, quins minerals ratllaria? Es podria ratllar amb un cristall de quars? Raona la resposta.

The trp operon in e.coli regulates genes that code for enzymes required for synthesis of the repressible operon. when tryptophan is not available amino acid tryptophan. the trp operon is a in the environment, the trp repressor protein activeinactiveregulated. therefore, rna polymerase can bind to the genes to begin transcription.

This comparative chart is an example of one that might be used by scientists and law enforcement personnel for identification purposes. the chart represents a technological advance called

What element is able to combine with itself and hydrogen to form large molecules ?