Answer:
Plants need water, warmth, nutrients from the soil, and light to continue to grow.
Explanation:
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Food web only contains interactions between trophic levels while an interaction web shows both trophic and non-trophic interactions.
 
        
                    
             
        
        
        
Answer: By studying the fossil record we can tell how long life has existed on Earth, and how different plants and animals are related to each other. Often we can work out how and where they lived, and use this information to find out about ancient environments. Fossils can tell us a lot about the past.
 
        
             
        
        
        
The chart very nicely lays out the amino acid each codon corresponds to. You're looking for "trp" in the chart, which only appears once, beside the UGG codon. Therefore, only one codon codes for tryptophan.