question:  If, after being marooned on the alien planet, Moran does not discover any edible vegetation, how would he be expected to survive?
context: Now it lay astern, and Moran could see the planet that had been chosen for his marooning. A water-ice ice-cap said that there were no poisonous gases in the planet's atmosphere. But since there were ice-caps there would be temperate regions. In short, the ice-cap proved that a man could endure the air and temperature conditions he would find. Moran observed these things from the control-room of the Nadine , then approaching the world on planetary drive. Without rigid control of space-travel, any criminal anywhere could escape the consequences of any crime simply by buying a ticket to another world. Moran couldn't have bought a ticket, but he'd tried to get off the planet Coryus on the Nadine . Moran, at least, would be picked out as a fugitive from Coryus Three. It could have travelled at almost any speed in practically any direction for a length of time that was at least indefinite. 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. "I think," said Carol, to Moran, "that if it's too tropical where this signal's coming from, we'll take you somewhere near enough to the ice-cap to have an endurable climate. If somebody were wrecked on an even possibly habitable planet, the especially developed seed-strains would provide food in a minimum of time. Moran wondered, momentarily, what sort of world they came from and why they had revolted, and what sort of set-back to the revolt had sent the five off in what they considered a strategic retreat but their government would think defeat. Moran had needed to get off-planet, and fast. But space-travel regulations are especially designed to prevent such escapes. He surrendered, stipulating that he wouldn't be landed back on Coryus; he still clung to hope of avoiding return—which was almost certain anyhow.
output:  He could use limited, fast-growing seed packets provided by the crew members of the Nadine.
options:  His space-suit is equipped with a nozzle through which he can absorb nutrients in gas form.  His only option would be to prey on animals, bacteria, fungi, or other living creatures.  He could use limited, fast-growing seed packets provided by the crew members of the Nadine.  He would not have any viable chance of survival without non-toxic vegetation.