Observe how deeply in the agar your organism grew. Is there growth on the surface? Where is the majority of the growth located? Remember that your unknown organism was inoculated all the way to the bottom of the tube initially, so there may be bacteria visible along the whole inoculation line. But evaluate where you see the most growth.

Near the bottom.

Explanation:

The organism grew deep in the agar solution near to the bottom of the petri dish. No, the growth occurs at the bottom of the agar solution because the bacteria does not need oxygen and can survive in anaerobic condition. Majority of the growth located at the sides of the petri dish in the form of colonies.  The most growth of bacteria occurs at the bottom of the medium.

the correct answer: the index of refraction of the second medium is lower i tried this persons answer and it was wrong this person is lying

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.