<span>(1) Does the pH of water affect the growth of radish plants?
</span><span>(2) pH of the water
</span><span>(1) repeating the experiment several times</span>
        
                    
             
        
        
        
Involuntary, meaning things in the body such as your heart is all regulated to act unconsciously while also receiving directives from the brain.
        
                    
             
        
        
        
 
 
1. Sand particles are too big to dissolve so their density sinks them 
2. Sediment is a naturally occurring material that is broken down by processes of weathering and erosion, and is subsequently transported by the action of wind, water, or ice or by the force of gravity acting on the particles.
 
        
             
        
        
        
Answer:
True
Explanation:
The deep parts of an ocean receive minimal or no sunlight. Hence, the survival of phototropic organisms like plants and algae is impossible or minimal here. Hence, there is a very little diversity in deep oceans. The organisms living here have to feed on dead decaying matter or on each other for survival. Mostly, the organisms living here use dead organisms as food. No other food source is available here. 
 
        
             
        
        
        
It's biotic, biotic is basically anything living
Hope this helps