Question: The son of who was a German botanist, horticulturist, and microscopist, who joined the Schleswig-Holstein army to fight the first round of military conflict in southern Denmark and northern Germany rooted in the Schleswig-Holstein Question?
Sentence (from "Johannes Groenland"): He was born April 8, 1824 in Altona, a borough of Hamburg that was part of the Duchy of Holstein at that time.
Relevant evidence: No