Which is a type of fern, Adiantum or Hylomecon?
Adiantum Adiantum , the walking fern or maidenhair fern, is a genus of about 250 species of ferns in the Vittarioideae subfamily of the family Pteridaceae, though some researchers place it in its own family, "Adiantaceae". The genus name comes from Greek, meaning "not wetting", referring to the fronds' ability to shed water without becoming wet.
Phaeodactylum tricornutum Phaeodactylum tricornutum is a diatom. It is the only species in the genus "Phaeodactylum". Unlike other diatoms "P. tricornutum" can exist in different morphotypes (fusiform, triradiate, and oval), and changes in cell shape can be stimulated by environmental conditions. This feature can be used to explore the molecular basis of cell shape control and morphogenesis. Unlike most diatoms "P. tricornutum" can grow in the absence of silicon, and it can survive without making silicified frustules. This provides opportunities for experimental exploration of silicon-based nanofabrication in diatoms.