Answer:
is there supposed to be a picture
Answer and Explanation:
To test the presence of glucose, we can perform <u>Benedict's test.</u> This test detects the presence of reducing sugars (e.g. glucose) by adding <u>Benedict's reagent.</u> This reagent contains sodium carbonate, sodium citrate and copper(II) sulfate pentahydrate. When the mixture is heated, reduce cupric compounds (Cu2+) are formed which results in the change in color from clear blue to brick-red, yellow or green.
To test the presence of glucose in the food sample, we will dissolve a small volume of food sample in water and put it in the test tubes, in triplicates. Then we will add 3 mL of Benedict's reagent. Also, we will run positive and negative controls. For positive controls, we will add glucose directly and for negative, we will not add any glucose or other reducing sugars (also in triplicates each). Then we will heat the test tubes in water water for 5-10 minutes. In the positive control, the color would change to green, yellow or brick red; but in negative control, it will stay blue (see figure attached for explanation). For the food sample, if the glucose or reducing sugars would be present, the color will change. In case of low sugar, it will be green, but increasing sugar content would change the color to yellow/orange and red. Because the experiment will be conducted in triplicates, we would be also able to verify if the results were consistent and there was no human or technical error.
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Answer;
Zone II
The area most significantly subjected to the ecological principles suggested by park is Zone II.
Explanation;
Zone II also the zone in transition, is appropriately named since it was truly in a state of transition from residential to industrial, primarily because it was the area of the city in which businesses and factories were invading residential areas. was the area that was most significantly subjected to the ecological principles, Park suggested: invasion, domination, recession, and succession.
Answer:
rain go brrrrrrrrrrrrrrrrrrrrrrrrrr
Explanation:
Think. use that noggin. Thunder means lightning, which is electricity, and water conductivity vs no conductivity in ice or snow, so not snow, hail, or sleet, meaning it is rain.
Water has conductivity because in snow and ice the ions responsible for creating a charge are not mobile like in water because they are frozen.