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agar will lose it's ability to show difference between hemolysis

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2w ago

Higher concentrations of colistin and nalidixic acid may have caused increased cell membrane disruption in gram-positive organisms, leading to cell lysis and death. Additionally, the mechanism of action of these antibiotics may be specific to gram-negative bacteria, making them less effective against gram-positive organisms at higher concentrations. Resistance mechanisms in gram-positive organisms may also play a role in reducing the effectiveness of these antibiotics at higher concentrations.

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Q: What are some Possible reasons why higher concentrations of colistin and nalidixic acid was less effective at allowing growth of gram-positive organisms?
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What is the difference between haloduric and halophilic organisms?

Halophilic organisms like being, and grow, better on places with high concentrations of salt while haloduric organisms can stay on places with high concentrations of salt but they won't grow (reproduce)...the just survive.


What happens to the micro-organisms in sugar or salt?

When micro-organisms come into contact with high concentrations of sugar or salt, the osmotic balance is disrupted, causing water to leave the cells through osmosis. This can lead to dehydration and ultimately cell death, making sugar and salt effective at inhibiting the growth of microorganisms.


What are chemophiles?

Chemophiles are organisms that thrive in environments with high concentrations of chemicals or toxins that would be harmful to other organisms. These organisms have developed adaptations to utilize or tolerate these chemicals for their survival.


What element is abundant to soil and is an effective poison?

Arsenic is an element that is naturally abundant in soil and can be toxic to humans and other organisms in high concentrations. It is commonly found in ores and minerals in the Earth's crust and can leach into soil from natural sources or human activities such as mining or agriculture.


What organisms does phytonmining?

Plants are the organisms used for phytomining. If plants can absorbs the low concentrations of metals in soil, the metals can be concentrated in the biomass of the plants and then extracted from the plant material when harvested.

Related questions

What is the difference between haloduric and halophilic organisms?

Halophilic organisms like being, and grow, better on places with high concentrations of salt while haloduric organisms can stay on places with high concentrations of salt but they won't grow (reproduce)...the just survive.


What happens to the micro-organisms in sugar or salt?

When micro-organisms come into contact with high concentrations of sugar or salt, the osmotic balance is disrupted, causing water to leave the cells through osmosis. This can lead to dehydration and ultimately cell death, making sugar and salt effective at inhibiting the growth of microorganisms.


What is the process concentrations of harmful substances increase in organisms at higher tropic levels in a food chain known as?

This process is called biomagnification. It occurs when toxic substances accumulate in the tissues of organisms as they consume prey with increasingly higher concentrations of harmful substances. As these toxins are passed up the food chain, the concentrations become more concentrated in organisms at higher trophic levels.


What are chemophiles?

Chemophiles are organisms that thrive in environments with high concentrations of chemicals or toxins that would be harmful to other organisms. These organisms have developed adaptations to utilize or tolerate these chemicals for their survival.


Why is diffusion possible in unicellular organisms not in multicellular organisms?

It is possible in multicellular but not effective .


What do you call microbes that can not survive except in the presence of high concentrations of salt?

You think probable to organisms called halophile.


What element is abundant to soil and is an effective poison?

Arsenic is an element that is naturally abundant in soil and can be toxic to humans and other organisms in high concentrations. It is commonly found in ores and minerals in the Earth's crust and can leach into soil from natural sources or human activities such as mining or agriculture.


What organisms does phytonmining?

Plants are the organisms used for phytomining. If plants can absorbs the low concentrations of metals in soil, the metals can be concentrated in the biomass of the plants and then extracted from the plant material when harvested.


What controls the concentrations of organic matter in soils?

Soil micro-organisms control the concentration of organic matter in the soil. Thus, fertile soils are full of soil humus and micro-organisms.


How effective was bolling on each organism why?

It was completely ineffective. Organisms do not boll.


Why is it important that living organisms not reach equilibrium in the concentrations of oxygen and carbon dioxide?

It is important for living organisms to not reach equilibrium in oxygen and carbon dioxide concentrations because maintaining a gradient allows for efficient gas exchange in respiration and photosynthesis. This ensures that oxygen is available for cellular respiration and carbon dioxide can be removed from cells, promoting metabolic processes and cellular function.


What roles do electrolytes play in osmoregulation?

Electrolytes are charged ions (Na+, Cl-, Ca2+, K+) that dissociate in water, meaning they are dissolved within water molecules being carried throughout your body and cells. This is creates concentration gradients within cells/tissues via osmosis and diffusion, from high concentration to low. This is vital in many animals becase too high electrolyte concentrations can cause cells to function abnormally (lysis, crenation) and the same with too low electrolyte concentrations. This is the reason homeostasis is important for maintiating the optimal balance/concentrations throughout an organisms body in order to maintain proper function of cells, tissues, organs, organ systems etc. Osmoregulation is pricisely this universal mechanism of constantly regulating water pressure/concentrations throughout an organisms body in order to survive. Its important to note, many organisms achieve homeostasis by different osmoregulatory mechanisms depending on their environment (teresstrial organisms, marine organisms, fresh water organisms...Aliens?) This is dependant on the electrolyte concentrations they are consuming via water from their enviornment. (remember we are made of roughly 68-70 % water)