The methylene blue reduction test is a test commonly used to estimate the microbial load of a milk sample and as a result, examine the quality of the milk.
The principle of this test is that methylene blue is a dye which loses its colour in the absence of oxygen. Bacterial metabolism can cause the depletion of oxygen in the milk, therefore the methylene's reduction rate is connected to the presence of microorganisms in the milk.
As a consequence, if the tubes were not sealed tightly, then oxygen will enter the tube and the dye's colour will diminish, giving a false result concerning the presence of microorganisms in the sample.
Answer:
Secondary consumers include owls, bears, lions and humans – along with many other organisms, and can be considered the predators in a given ecosystem. Many secondary consumers are carnivores, some of which are eaten by tertiary consumers.
Specialized cells that filter out food particles, such as bacteria; characteristic of sponges. Animal that obtains organic matter for nutrition by filtering particles out of water. Opening through which water flows out of a sponge; excurrent pore.
Answer:
False
Explanation:
polysaccharide are formed when dehydration reaction occurs between a large number of monosaccharides. amylose is a polysaccharide compose of between 60 and 300 glucose
Answer:
1. A rain
you can expect light showers of rain from fluffy white clouds.
2. A runoff
surface runoff happens when a water source can no longer sufficiently rapidly i infiltrate the soil.
3. D evaporated
the water has now, over time, evaporated.
4. C snowfall
snowfall is a common weather event, not extreme.
5. D all of the above
weather can be described and measured in numerous ways, including more than the few listed
