CREATE TABLE table_21798 ("Scientific name" TEXT, "Common name" TEXT, "Length  ( male ) " TEXT, "Length  ( female ) " TEXT, "Color" TEXT, "Lifespan  ( years ) " TEXT)

Name the scientific name for veiled chameleon
SELECT "Scientific name" FROM table_21798 WHERE "Common name" = 'Veiled chameleon'
SELECT "Scientific name" FROM "table_21798" WHERE "Common name" = 'Veiled chameleon'