The finches of the galápagos islands changed over time as insects became more plentiful.

C) Directional selection

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The matrix can be used to detect the expression of the target gene

Explanation:

DNA probes enable to identify target acid nucleic sequences (i.e., DNA or RNA) that are capable of hybridizing with the probe. The probe is usually labeled with different 'detectors' (i.e., radioisotopes, fluorophores, epitopes, etc), thereby allowing its detection by observing the response to the hybridization process. For example, a DNA microarray can be used to detect simultaneously the expression of thousands target genes.