What type of air mass brings dry hot weather

answer: angiosperms

dicots

angiosperms are highly evolved plants, they produce seeds which are enclosed within in a carple. these are the largest group of plants on earth. they include trees, shrubs, herbs and small flowering plants. angiosperms exhibit a flowering stage in their life cycle. the flower serves the function of reproduction and fruit formation in majority of angiosperms. dicot is the term used to describe flowering plants that have two seed leaves. dicots are plants which develop seeds which split into two parts called cotyledons. each cotyledon contains one embryo.

here, a small purple flower development indicates that the plant belongs to angiosperms and having two embryonic leaves indicates it belongs to dicots.  

in tropical forests it typically is hot with a lot of rain. when what is hot, it starts to evaporate and turn into water vapor.

lichens that colonize bare rock secrete acids that break down the rock and start the soil-production process. so they expose rocks

not sure if this is what you'r looking for prokaryotes have organelles hope this out at least.