missing content in sims 3

@gamernicki  How are you trying to make your sim into a plantsim?  Please describe where you expect to see the option.

Genies come with Showtime, not World Adventures.  WA has mummies, but there's only one (non-mod-related) way to make an existing sim into a mummy; you can't choose it in CAS.  And this way doesn't work on sims that already have another occult state.

For the issue going to work, try telling your sim to change into their work outfit beforehand.

@gamernicki  Here's how to create a plantsim:

https://www.carls-sims-3-guide.com/universitylife/plantsims.php

thank you for the link. i took a look in game for the forbiden fruit for plant sim but couldn't find it. as a mater of fact there are no plant sim NPCs in the game. as for your suggestion about putting on career clothes before work didn't help as my sim still wont go to work. and now steam wont read the fact that i have sims 3 generations installed on my computer. i really hope i don't have to buy another copy of the game just for steam.

@gamernicki  As the guide says, your sim needs to create a forbidden fruit using the Research Station, specifically performing the gene splicing experiment on an existing seed of some kind.  (They're easy to find on the ground out in the world.)  This is only one possible outcome, but since seeds are plentiful, it's not hard to keep trying.

For the sim that can't go to work, what career are they currently in?  If you have room, try placing another rabbithole for that career somewhere in the world, delete the first one (so the sim will automatically work at the new location), and see whether that helps.

For Generations, do you own it through Steam or the EA App?  Steam doesn't recognize packs bought through the EA App, although the App does accept Steam CD keys.

Finally, let me know if you use or are willing to add some mods to try to get around the first two issues.