what is the whole-genome shotgun sequencing? Also briefly explain its strategy to assemble the genome sequence.

Outline different strategies for identifying gene sequences.

Check all the statements that are TRUE regarding 16S or ITS (microbiome) illumina (NGS) sequencing vs. whole genome illumina (NGS) sequencing.    A. You don't need to trim the reads for 16S sequencing, but you do for whole genome sequencing.   B. Whole genome sequencing files will have more reads in them because genomes are bigger than 16S amplicons.   C. The read alignment and contig assembly steps would probably be harder for whole genome sequencing.   D. The 16S molecules being sequenced are always DNA, while for whole genome sequencing they could be RNA or DNA going into the illumina sequencer.   E. NGS for 16S and whole genome sequencing can both use sample indexes/barcodes to maximize efficiency.   F. Whole genome sequencing doesn't necessarily require you to know any of the sequences/targets before hand to design specific primers for.

What is meant by the term "alignment" in genomic research and in what ways does alignment aid sequence assembly?  How can relying on alignment lead to potential errors?