An established bacterial community is exposed to a dark environment for several days bacteria that require light to reproduce will
Show blank compared to bacteria that do not require light to reproduce
A. Uncontrollable growth
B. Lack of growth
C. The same amount of growth
D. More growth
B. Lack of growth
B. Lack of growth
The correct answer is B. Lack of growth.
To understand why, let's break down the question and the different options.
The question states that an established bacterial community is exposed to a dark environment for several days. It also mentions that there are bacteria that require light to reproduce and bacteria that do not require light to reproduce.
Bacteria that require light to reproduce are typically referred to as phototrophic bacteria, which rely on light energy to carry out photosynthesis. This process allows them to convert light energy into chemical energy that can be used for growth and reproduction. Without light, these bacteria cannot perform photosynthesis and thus cannot reproduce.
On the other hand, bacteria that do not require light to reproduce are known as heterotrophic bacteria. These bacteria obtain energy by breaking down organic compounds present in their environment, such as sugars or other organic matter. They do not rely on light to carry out their metabolic processes, so they can still grow and reproduce in the dark.
Therefore, when an established bacterial community that consists of both phototrophic and heterotrophic bacteria is exposed to a dark environment for several days, the phototrophic bacteria will be unable to reproduce due to the lack of light energy. In contrast, the heterotrophic bacteria will still be able to grow and reproduce using other sources of energy, such as the organic compounds present in their surroundings.
As a result, the correct answer is B. Lack of growth for bacteria that require light to reproduce compared to bacteria that do not require light to reproduce.