Answer:
Peptidoglycan layer.
Explanation:
The thickness of the peptidoglycan protein layer is the main difference between gram negative, and gram positive bacteria. Gram positive bacteria contains thick peptidoglycan layer which retains the gram staining, and making the bacteria purple under the microscope.
Gram negative bacteria contains thin peptidoglycan layer which do not retain the gram staining, and making the bacteria pink under the microscope.
Answer: Proteins change shape as temperatures change. Because so much of an enzyme's activity is based on its shape, temperature changes can mess up the process and the enzyme won't work. High enough temperatures will cause the enzyme to denature and have its structure start to break up. Enzymes are responsible for many of the chemical processes that take place in animals, plants and microbes. They play a critical role in all life on Earth. Because every enzyme has a specific role and function, a change in its tertiary structure would cause the enzyme to be impaired in its function.
Explanation:
I guess the answer your looking for very much depends on your hypothesis. A controlled experiment is <span>experiment where a scientist (you/observer) tests their hypothesis by looking for changes occuring due to changing the variable. For example if you were testing to find the best soil to grow tomatoes, you'd keep everything the same but you'd be changing the type soil. </span>
This question is incomplete as no options are given. However, urbanisation typically leads to a greater percentage of impermeable surfaces, such as roads, parking lots etc. Water is then unable to filter into the soil and groundwater as much as it would on natural land. What then occurs is much more runoff in urban areas during rainfall. This has been problematic in major cities in the developing world, where storm water drains are not maintained. Rainfall can easily result in flooding, and floods can be much worse in urbanised environments. We must also consider that there will be reduced groundwater recharge in urban areas from rainfall, as less water infiltrates the soil. Interestingly, in urban areas, it is generally accepted that up to 60% of tap water is lost through leaks, many underground, so groundwater may be recharged through lost tap water.
It is a because it is the only logical explanation.