After an rna molecule is transcribed from a eukaryotic gene, what are removed and what are spliced together to produce an mrna molecule with a continuous coding sequence? see concept 17.3 (page 345)

After an RNA molecule is transcribed from a eukaryotic gene, Introns are removed and Exons are spliced together to produce an mRNA molecule with a  continuous coding sequence. 
In most eukaryotic genes, coding regions (exons) are interrupted by noncoding regions (introns). During transcription, the entire gene is copied into a pre-mRNA, which includes exons and introns. However, during the process of RNA splicing, introns are removed and exons joined to form a contiguous coding sequence. 

The answer your looking for is a food chain grid. it describes how nature can support itself and survival of the fittest comes into play..