Answer:
As a control, which, in this case, is a negative control. Since there is no carbohydrate added there will be no bacterial growth. In your tubes which do have some carbohydrate there will be bacterial growth. Since you used a control you can compare any changes in the tubes in which you have growth to the tubes without growth, which would represent the original state of the media. This makes any results easier to notice and interpret rather than having to remember what the tubes used to look like.
It also ensures that any change in the media is due to the growth of the bacteria and not some external factor. Since both sets of tubes were inoculated but only one set shows some change you can be sure that that change is due to the growth of the bacteria.
Answer:
Dominant
Explanation:
If both of the parents don't express the trait and the child does, then the pedigree is recessive. According to Mendel's law, the recessive trait will only show if there are two recessive alleles. If both of the parents of have the trait and their child does, that means that the parents are heterozygous.
If one of the parents have the trait and the child does or doesn't, then the pedigree is dominant.
Water can occur in three states: solid (ice), liquid, or gas (vapor).
Answer:
External stimuli are communicated to the brain by means of electrical signals propagating along nerve cells at a speed of approximately 32 m/s. Similarly, electrical messages are sent at the same speed from the brain along nerve cells to the muscles.
Explanation:
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Metabolic asphyxiation is the situation where a person's body has become severely deprived of oxygen, this can arise from carbon monoxide poisoning, drowning, drug overdose, hanging, respiratory diseases, sleep apnea, prolonged exposure to chlorine gas, strangling, seizure amongst other causes. With a deprived oxygen supply, a patient can experience severe brain or organ damage, as the cells are starved of the oxygen, the body will suffer and if left untreated, will result in the patient's death.