If today's maximum temperature was 14 degrees celsius and tomorrow's maximum is expected to be 28 degrees celsius will tomorrow be twice as hot as today? No. If it is zero degrees today, and 1 degree tomorrow, will it be infinitely hotter? Better to not use the concept.
Internally, slug anatomy clearly shows the effects of this rotationâbut externally, the bodies of slugs appear more or less symmetrical, except for the positioning of the pneumostome, which is on one side of the animal, normally the right-hand side. Slugs produce two types of mucus: one is
Gastropods that lack a conspicuous shell are commonly called slugs rather than snails. Some species of slug have a red shell, some have only an internal vestige that serves mainly as a calcium repository, and others have no shell at all. Other than that there is little morphological difference between slugs and snails.