Many Caribbean reefs face multiple environmental and biological threats. You can use the Coral Reefs Gizmo to design your own experiment to see how a combination of factors affects the reef. You can also design an experiment to see how quickly a reef recovers from a disturbance. Required:
Describe your question, experimental design, experimental results, and conclusions.

We need two types of environment for this experiment.

Explanation:

We need two types of environment to see the environmental effects on Caribbean reefs. In one environment we have to provide control and optimum environmental as well as biological conditions such as pH and no pollutants etc while on the other hand, we placed the Caribbean reefs in the open environment where environmental conditions are not suitable such as low pH, pollutants, algal blooms etc occurs. So we can see that the first environment have high growth rate of Caribbean reefs whereas the second environment has lower growth of Caribbean reefs due to low pH of the ocean water which prevent the growth of reef's skeleton so the conclusion of this discussion is that Caribbean reefs is negatively affected by environmental conditions.

b tumor cells have a cell wall instead of a membrane

explanation:

tumor cells different from normal cells because tumor cells have a cell wall instead of a membrane.

hypoxemia refers to a below usual concentration of oxygen in the blood, mainly in the arteries. hypoxemia is an indication of an issue associated with circulation or breathing and may lead to various symptoms like shortness of breath.  

the condition is identified by determining the level of oxygen in the blood sample obtained from an artery. it can also be predicted by determining the oxygen saturation of the blood with the application of a pulse oximeter.  

the normal arterial oxygen is about 75 to 100 mm hg. the values underneath 60 mm hg is generally considered with the requirement for supplemental oxygen. the normal pulse oximeter readings generally range between 95 to 100 percent. the values under 90 percent are regarded as low.  

in the given case, the oxygen saturation is measured at 93 percent, hence, there is no need to administer oxygen, that is, one should withhold oxygen.