Answer: 0.69 m/ mile.
Explanation:
The altitude gradient between two cities X and Y = 
Given: Two cities are separated by 200 miles.
 City X has an altitude of 122 meters.
City Y has an altitude of 260 meters.
The altitude gradient between two cities X and Y = 

Hence, the altitude gradient between the two cites = 0.69 m/ mile.
 
        
             
        
        
        
Answer:
substantive genes
Explanation:
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Answer:
Look in explanation
Explanation:
The sun provides energy to plants. The plants are eaten by herbivore/omnivores transferring the energy from the plant to the herbivore/omnivore, then the carnivore eats the herbivore/omnivore which gives the carnivore the energy
 
        
             
        
        
        
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For cellular respiration, the solution needs to be provided with glucose and optimum oxygen supply.
Explanation:
The cellular respiration uses the simplest form of food i.e. is glucose in its first step of glycolysis so, the food source must be in simpler form in the solution. Also, cellular respiration takes place in the presence of oxygen so optimum level of oxygen is to be supplied also temperature plays a key role so it also needs to be maintained.