Question

An environmental (soil) sample obtained from a temperate region was transferred to a liquid growth medium and incubated at 30°C for 24 hours, then transferred to solid growth medium in order to isolate bacteria from the original sample. Following 48 hour incubation at 30°C, the picture of the solid medium shows the results of this experiment. Which of the following statement(s) among A D are true regarding this experiment? A.This plate represents a pure cultu B Isolates A and B are likely the only bacterial types that would have been present in the original environmental sample. A and B are probably the same microorganism D.I dentification of microbial types in the environmental sample could have been attempted without culturing anything. two of of A D are correct F three of A - D are correct

Answer 1

Missing Question:

The question was missing information. I have found the question online and attaching it here for convenience.

Answer:

Option D

Explanation:

• From the picture, we can see two types of bacteria (i.e. A and B), therefore it is not a pure culture.

• We can not predict whether any culture has been lost during incubation.
• A and B are different organisms.

Hence, the only correct option is D, which states:

"Identification of microbial types in the environmental sample could have been attempted without culturing anything."