Before the 1990s cuban citizens could legally make money in addition to thier regular jobs

What groups of species are alive, eukaryotes, symmetrical, have backbones, and are tetrapods? (didn't mean to put spanish)

Which one of the following is the correct rhyme to keep in mind when using the spanish counterparts to this, that, those and these? a: “that” and “those” both have s’s, “this” and “these” don’t b: “that” and “those” both have t’s, “this” and “these” don’t c: “this” and “these” both have s’s, “that” and “those” don’t d: “this” and “these” both have t’s, “that” and “those” don’t

No debemos el medio ambiente. a. contaminar b. preservar c. desechar d. cumplir