Why is the horseshoe crab an example of a living fossil

They are most of living fossils because their bodies have changed very little over a vast length of time . They are true crabs which are crustaceans but instead are chelicerate Arthropods making more closely related to spiders and scorpions .

Explanation:

her next move would be to use agarose gel electrophoresis to separate the dna molecules of varying length and create a dna fingerprint.