The connective tissue layer surrounding bone is called the periosteum. It has an outer fibrous layer and an inner osteogenesic layer.
        
             
        
        
        
Answer:
- Eating different vegetables.
- Eating at different times.
- Eating in different places in the same region.
Explanation:
It is common for herbivorous animals of different species to share the ecological niche and the same habitat without establishing competition for resources. In this case, these animals manage to maintain a balance between their populations and the resources available for both species to survive. Three ways of doing this are:
- Feeding on different vegetables: Even though they are herbivores, some animals prefer a specific type of vegetable, or just feed on these vegetables. We can use as an example animals that eat only fruits and animals that eat only herbs.
- Eating at different times: Some animals have nocturnal habits, while others have diurnal habits. This is very efficient so that these animals are not competitors and are able to feed at different times
- Eating in different places in the same region: We can use as an example two species of turtles, where one lives on the south side of the region and feeds on the vegetables found there, while the other species lives on the north side of the region and feeds on vegetables found there.
 
        
             
        
        
        
Answer:
This question lacks options, options are:
a) The partial pressure of oxygen
b) Acidity
c) The partial pressure of carbon dioxide
d) Temperature
e) BPG
The correct answer is a. The most important factor that determines the percent of oxygen saturation of hemoglobin is <u>The partial pressure of oxygen
</u>. 
Explanation:
Hemoglobin is an oxygen transport protein. Partial Oxygen Pressure (PaO2), measures the pressure of dissolved oxygen in the blood, that is, it shows how well oxygen passes from the lungs into the bloodstream. A high partial pressure of oxygen in the blood produces an almost complete saturation of hemoglobin, which indicates the maximum amount of oxygen that combines, but when PaO2 is reduced, so is hemoglobin saturation, when saturation is below 90% hypoxemia occurs, that is, the level below normal blood oxygen levels.
 
        
             
        
        
        
The medication would be the controlled variable, the factor that remains constant.
        
             
        
        
        
It couldn't be analysed chemically because it's chemical composition is to complex. It would be hard for us to analyse them because once it has been removed from the organism, it ends as protoplasm only.