<u>Answer:</u>
Photosynthesis and respiration are so interrelated with each other that one’s product are used as another’s reactant. 
<u>Explanation:</u>
- Photosynthesis is a process used by organisms to convert 'light energy' into 'chemical energy', which is used as a source of energy for the organism. 
- Respiration is a process in which glucose and oxygen is used to create ATP for the survival of the organism. 
- During photosynthesis 'water and carbon dioxide' reacts in presence of light to create oxygen and glucose. 
- Without photosynthesis and respiration life ceases to exist on earth.
 
        
             
        
        
        
Answer:
four layers
Most rainforests are structured in four layers: emergent, canopy, understory, and forest floor.
Explanation:
 
        
             
        
        
        
Reactions that require carbon dioxide take place in the calvin cycle alone
Answer: Option D
<u>Explanation:</u>
Calvin cycle is an important cycle that plays a major role in the synthesis of starch through the photosynthesis. Calvin takes place as a part of the dark reaction in the stroma. 
It is the calvin cycle that requires carbon dioxide. It uses the ATP that are produced by the light reaction that takes place in the thylakoid with the help of chlorophyll that traps the sunlight.
 
        
             
        
        
        
A. social age
b. chronological age
c. psychological age
<span>d. biological age
Its D, biological age.</span>
        
             
        
        
        
In assessing for complications in a client who has been using crutches for two weeks, the finding that is most important is the hand and wrist weakness which is number three because this is the part of the body that exerts the most effort because it supports the crutches in order for the body to move. And if it is weak, it could be a problem to the client using crutches.