How does genomic library differe from cdna library a genomic library contains only noncoding sequences g?

Explanation:

1) A genomic library contains coding and noncoding sequences, whereas a cDNA library contains only coding sequences.

2) A genomic library contains DNA fragments that express the whole genome of an organism while in cDNA library, mRNA is taken from specific cells of an organism, and then cDNA is made from that mRNA.

3) A genomic library varies, dependent on the cell type used to make it, whereas the content of a cDNA library does not.

answer: the blood-brain barrier is a layer of specialized membranes and cell processes designed to keep undesirable substances from passing from the bloodstream into the precious tissues of the brain. while the blood-brain barrier does keep most bad things out of the central nervous system, it is not impermeable.

explanation:

that is wrong, its not thymus.