 If the marocca plants happened to die during transport, what would be one logical explanation for why they died based on the conditions they needed to survive in the article?
[Transcriber's Note: This etext was produced from Worlds of Tomorrow June 1963 Extensive research did not uncover any evidence that the U.S. copyright on this publication was renewed.] Captain Hannah climbed painfully down from the Delta Crucis , hobbled across the spaceport to where Beulah and I were waiting to greet him and hit me in the eye. His eyes were swollen almost shut; every inch of him that showed was a red mass of welts piled on more welts, as though he had tangled with a hive of misanthropic bees. It was riding high on his head, apparently held up by more of the ubiquitous swellings. "Shipping marocca to Gloryanna III didn't turn out to be a cakewalk after all?" "A Delta Class freighter can carry almost anything," he said at last, in a travesty of his usual forceful voice. I almost felt sorry for him, but just then Beulah came racking across the field with her two-ton infant in tow, to show her off to Hannah. He had foisted those two maudlin mastodons off onto me in one of our earlier deals, and if I had somehow been responsible for his present troubles, it was no more than he deserved. The fruit of the marocca is delicious and fabulously expensive. The plant grew only on the single planet Mypore II. Transshipped seeds invariably failed to germinate, which explained its rarity. The Myporians were usually, and understandably, bitterly, opposed to letting any of the living plants get shipped off their planet. But when I offered them a sizable piece of cash plus a perpetual share of the profits for letting us take a load of marocca plants to Gloryanna III, they relented and, for the first time in history, gave their assent. "When I left, marocca was growing like mad," said Captain Hannah. "It was you who said that we should carry those damn plants to Gloryanna III," he said balefully. You know that marocca takes a very special kind of environment. Bright sun most of the time—that means an almost cloudless environment. Days and nights the same length and no seasons—that means no ecliptical and no axial tilt. But our tests showed that the plants had enough tolerance to cause no trouble in the trip in Delta Crucis ." "Your tests were no good," agreed the captain with feeling. "I'll tell you about it first, and then I'll black your other eye," he decided.
 An error on the spaceship caused the artificial days and nights to not be equal length.
 The temperature of the environment did not vary enough and was too stagnant for the plants.  The carollas decided to start eating the dingleburys instead of vice versa.  An error on the spaceship caused the artificial days and nights to not be equal length.  The spaceship was not correctly simulating all the seasons that the marocca needed to be subjected to in order to grow.