Amicrobiologist inoculates staphylococcus epidermidis and escherichia coli into a culture medium. following incubation, only the e. coli grows in the culture. what is the most likely explanation?
a. the microbiologist used too much inoculum.
b. the culture is contaminated.
c. the incubation temperature was incorrect.
d. the culture medium must be selective.
e. the culture medium must be differential.

The culture medium must be selective.

Explanation:

Selective media allows for certain microorganisms to grow while inhibiting the growth of others. In this case, the culture medium is selecting for E. coli while simultaneously preventing the grown of S. epidermidis

prophase: we can observe the chromosomes to coil up and condense. they become visible. nuclear membrane and envelope disintigrate.s

metaphase: chromosomes align at the center, the metaphase plate. spindle fibers attach to centromeres of the sister chromatids. they meet at kinetochores.

anaphase: sister chromatids are pulled towards each opposing centromere, set on different poles.

telophase: chromosomes are now clustered up only on either sides of the cell. nuclear membranes reform, and a new cell wall forms along the cell plate. this will lead to cytokinesis, the process that divides the cell membrane and forms the cell wall.

there are so many examples for that in different areas, like biology experiment carried out in our lab recently.

here's one link: