Prokaryotic cells because they don't have a nuclei.
        
             
        
        
        
Answer:
The correct answer is - Archaea or archaebacteria.
Explanation:
Archaea is the domain and the kingdom of the single-cell prokaryotic organisms as they lack a nucleus. These organisms are present in extreme habitats such as hot springs, high saline water. These organisms can live in extremely aggressive environments which makes it a uniqe characteristic of this organism.
In the given condition the organism that lives in hypersaline water is most likely a member of the  Archaea domain or Archaebacteria kingdom as it is found in the hypersaline waters of Southeastern Australia and unicellular organisms.
 
        
             
        
        
        
Answer:
The example of direct interaction between two organisms is in coral reefs some fishes behave as a cleaner for the other fish. 
Explanation:
The fish eats the parasites which harms the other fish. In this the cleaner fish gets food and the other fish gets rid of parasites. The example of indirect interaction between two organisms is when the birds eat the caterpillar, there is a positive impact on the plants because the Caterpillars used to the leaf of the plants.
The direct interaction between two organisms is defined as when the action of one organism has a direct impact on the other organism. The indirect interaction between two organisms is defined as when the action of one organism is responsible for indirect impact on the other organism.  
 
        
             
        
        
        
1.	Respiration-process by which plants release CO, while they break down the sugar
2.	Animals eat plants- They break down sugars and starches by a process of metabolism and the products are energy water, and CO2 molecules.
3.	Decomposition-when plants die, their parts (wood, leaves) decay bringing the carbon into the ground
4.	Root respiration- respiration that occurs in roots, adds to soil respiration (the amount of CO2 produced through root respiration is determined by the root biomass ).