There is a minor glitch in the transporter's molecular imaging scanners. They try narrowing the annular confinement beam to correct it. After Kim runs a diagnostic on the bio-filters and transporter logs they confirm that the glitch did not interfere with the beam-out.

The transporter malfunction causes all of Tuvok and Neelix's biological matter to merge on a molecular level. All vital signs are stable, and he has the memories of both men, but a single consciousness - he takes the name Tuvix.

Tuvix wants to conduct a field test of the aft sensor array

Sickbay is on Deck 5 (established also in earlier episodes).

Among the flowers grown in the airponics bay are prize-winning chrysanthemums and garden variety clematises.

Weapons (at least one phaser) are available to the transporter officer(s).

Torres and Paris use containers to put plant specimens in - one has clear sides, one has non-clear sides.