Answer:
Water sample showing pink/purple color is an error.
Explanation:
Biuret is a blue color reagent that changes its color to pink/purple whenever it detects protein in a sample. Water don't contain proteins so it should not show pink/purple color instead it should maintain the blue color. Food items generally contain proteins so it show pink/purple color but it showed blue color.
Error might have caused by wrong marking of the samples, test tube marked with Water might contain a mystery food while Mystery food tube might contain water.
Answer:
A
Explanation:
The energy carried by electromagnetic waves is sometimes referred to as radiant energy. Electromagnetic waves do not require a medium for propagation hence they can travel through vacuum and are known to transmit enormous amount of energy.
Electromagnetic waves transmit energy away from the source of the wave. Hence the answer chosen in the answer section above.
Answer:
Population growth, lack of supplies
Explanation:
Urbanization can impact an area, especially population growth. People could be crowded, and that supplies could run out as it is an urbanized region.
C: organise into charts ,graphs ,do calculations if necessary.
<span>The correct answer is Some plant and animals are restricted to a particular habitat. That means that they would not be able to live in other habitats either because of natural predators that would eliminate them or because they would ruin the ecological system if they were to interfere with the natural order of things. Things like climate might also affect this.</span>
