 Why have the planet's life forms developed abnormally?
The ice-cap, by its existence and circular shape, proved that the planet rotated at a not unreasonable rate. A water-ice ice-cap said that there were no poisonous gases in the planet's atmosphere. Without rigid control of space-travel, any criminal anywhere could escape the consequences of any crime simply by buying a ticket to another world. The process would be to find a planet and check its climate and relationship to other planets, and its flora and fauna against descriptions in the Directory. All five of its proper company watched as the planet's surface enlarged. If somebody were wrecked on an even possibly habitable planet, the especially developed seed-strains would provide food in a minimum of time.
 An element was missing during the planet seeding process. This element would've encouraged normal growth.
 The dense cloud cover caused them to grow abnormally large.  The light of uncountable suns caused them to grow abnormally large.  A sulphuric-acid ice cap caused them to grow abnormally large.  An element was missing during the planet seeding process. This element would've encouraged normal growth.