It’s important there’s molecules that could do so for keeping homeostasis, food movement, keeping the cell isotonic with movement of water, glucose to go into cell to not let it starve and waste to escape and not build up in cell
        
             
        
        
        
Answer:
None of these options is correct.
Explanation:
As in first option animal show herbivorous behaviour by eatin plant as well as in second option  plant is toxic for animal .
while symbiosis is a process in which two animals stay together to harm each other or to help each other or for some other conditions but in these options there is no such situation here.
 
        
             
        
        
        
Answer: None of the Above. 
Explanation: Protista can be anything, and are basically off-brands, Plant based, Fungi Based, Animal Based, Etc.So the ENTIRE kingdom cant be Prokaryotic or Eukaryotic.
Animals and Plants aren't Single-Celled because you can see them. 
Fungi are Eukaryotic
 
        
             
        
        
        
Answer:
right ventricle
Explanation:
because it pump the blood to the right atrium into the lungs
 
        
             
        
        
        
<em>Convection currents form because a heated fluid expands, becoming less dense. The less-dense heated fluid rises away from the heat source. As it rises, it pulls cooler fluid down to replace it. This fluid in turn is heated, rises and pulls down more cool fluid. This cycle establishes a circular current that stops only when heat is evenly distributed throughout the fluid. For instance, a hot radiator heats the air immediately around it. The air rises toward the ceiling, pulling cooler air down from the ceiling into the radiator to be heated. This process repeats until the air in the room is evenly heated. Convection drives the Gulf Stream and other currents that turn over and mix up the waters in the world’s oceans. Cold polar water is drawn down from higher latitudes and sinks to the ocean bottom, pulled down toward the equator as lighter, warmer water rises to the ocean’s surface. The warmer water is pulled northward to replace the cold water that’s been pulled southward. This process distributes heat and soluble nutrients around the world. Thermal energy also moves within the ocean and within the atmosphere through the process of convection. During convection, cooler water or air sinks, and warmer water or air rises. This movement causes currents. Ocean currents are like rivers of water moving through the sea. The convection happens because hot water has a lower density and thus rises up to the surface where it cools and sinks down to the bottom again. When water starts boiling there is the additional effect of the formation of water vapor bubbles that have a much stronger buoyancy than hot water.</em>