The most powerful approach to isolating a single mutant from a population of billions is positive selection.
An advantage of using models to represent the carbon cycle is: B. show a complete and detailed account of every event in the cycle.
A carbon cycle refers to the series of biogeochemical processes through which carbon atoms or carbon compounds are interconverted and used by living organisms within an environment, especially by transporting carbon from the atmosphere to planet Earth and then back to the atmosphere.
Basically, there are four (4) main processes that are associated with carbon cycle and these include:
- Combustion such as burning of fossil fuels.
A model can be used to graphically illustrate or simulate the all of the activities (events) that are taking place within the carbon cycle.
Hence, an advantage of using models to represent the carbon cycle is that it would illustrate (show) a complete and detailed account of every event in the cycle.
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A voice that criticizes your thoughts and actions.
Answer: In short, the answer will be choice A
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The first line of defence (or outside defence system) includes physical and chemical barriers that are always ready and prepared to defend the body from infection. These include your skin, tears, mucus, cilia, stomach acid, urine flow, 'friendly' bacteria and white blood cells called neutrophils.
Answer: B. Speed up the chemical reaction
Explanation: Enzymes help speed up chemical reactions in the human body. They bind to molecules and alter them in specific ways. They are essential for respiration, digesting food, muscle and nerve function, among thousands of other roles.