A microbial ecologist wants to study a bacterium that is adapted to growth in lake water containing very low nutrient concentrations. Assuming that a suitable growth medium is available for this organism, which type of culture would be best to use for growing this organism in the lab?
A) this organism cannot be grown in the lab.
B) a batch culture using a low-nutrient medium
C) on Petri plates containing a low-nutrient medium
D) a chemostat using a low-nutrient medium

D) a chemostat using a low-nutrient medium

Explanation:

A chemostat is a bioreactor in which a constant chemical environment is maintained. In the bioreactor the fresh medium is added, whereas the culture liquid, left out nutrients, microorganisms and metabolic end products are removed from the medium at the same rate to keep the volume of the culture constant.

The volume and concentration of the nutrient medium can be maintained in the chemostat bioreactor.

According to the given situation, the bacteria can be cultured in low-nutrient growth medium that is the lake water to observe its adaptation under the low-nutrient concentration.

small, big, or no change could occur in the phenotype. it could cause something as simple as a cats ears to curl backwards or something as frighting as death. it could also occur in the protien-coding area and have an effect on that but no effect on the amino acids. what has to occur is a changing in the hox gene or the control gene.

six grader is what i am ssorry