Aresearcher is using the puc18 vector to introduce a human gene into bacteria. he

The results from this experiment conclude that all of the resulting bacteria contain the pUC18 plasmid without the human gene.

The method of genetic engineering might seem very easy but in actual it is a very difficult task and most of the time a person won;t get the expected results. The chances of a vector to actually take up a recombinant DNA are very less. Even after this, the chances of a recombinant plasmid to enter a bacterial cell by transformation are very few.

If the pyramid has a wide base and actually resembles a pyramid, the reproductive population is producing a lot of children, which in time will increase the growth rate in time. If it is column-shaped represents stable growth. However, if the pyramid is inverted it show that reproductive-age residents are not having children which will NOT be good for the population.