Prokarya

Introduction
They have their own evolution and domains.  Their morphology is unique.  They reproduce asexually.  They have organelles, but not as many as eukaryotes.  They have their own way of getting energy.  In many different environments you will find these organisms.

Evolution
These were the first organisms to evolve on earth.  They are been around over 3.5 billion years!!!  It is believed by some that prokaryotes comes from protocells.  Other feels they are the children of eukaryotes.  A few thick the 3 domains came being @ the same time.

Domains
There are 2 types of prokaryotes.  They are archaea and bacteria.

There are 3 genres of archaea:  crenarchaeota, euryarchaeota, and korarchaeota.  Crenarchaeota live in extreme temperatures.  They live in cheese, volcanos, yogurt, glaciers, etc.  Euryarchaeota eat salt and produce methane.  Some of them live in are gut!!!  Korarchaeota live near hydrothermatic vents in the oceans.

Genes dealing with metabolic pathways are similar in archaea and bacteria.  But, genes dealing with genome expression are common in archaea and eukarya.  Archaea is more related to gram positive bacteria than gram negative bacteria.  Eukarya is child of archaea, or so it seems.  Archaea only helps and never harms, humans.

Bacteria are the oldest organism on earth!!!  They engage in a lot of horizontal gene transfer.  That why so many bacteria become resistant to antibiotics.  All bacteria are bilingual.  Each species have its own language and there is a interspecies language they all speak.  Actinobacteria may be the ancestor of of archaea and eukarya.   Mycoplasmas are the smallest bacteria.  There are viruses bigger than them and they are anaerobic.  Bacteria is the most diverse domain.   

Morphology
Archaea and bacteria have the same shape and size, mostly.  There shapes are "spheres, rods, spirals or plates."  There is one species of archaea that have a square shape.  They have organelles, but not as many as eukarya.  They both have cell walls, plasma membranes, cytoplasm, cytoskeleton, and ribosomes.  They use pili and and flagella to get around. 

Asexual Reproduction
Most prokaryotes reproduce by binary fission.  Binary fission is when a cell creates a clone of itself.  If you want to learn about sexual reproduction read the eukarya post.   

Food
Some prokaryotes produce their own food with sunlight or chemicals.  Some of them eat carbon, nitrogen, or sulfur.  Some are aerobic, while others are anaerobic.  Some switch between the 2.   

Conclusion
Prokaryotes are amazing!!!!  They are our ancestors and the oldest life forms on earth.  They come in 2 domains and have an amazing morphology.  They reproduce asexually and eat different kinds of food.  Some of them produce their own food as well!    

References
https://en.wikipedia.org/wiki/Prokaryote
https://en.wikipedia.org/wiki/Archaea
https://www.sciencetopia.net/biology/archaea-and-types
https://en.wikipedia.org/wiki/Bacteria
https://www.khanacademy.org/science/biology/bacteria-archaea/prokaryote-metabolism-ecology/a/prokaryote-metabolism-nutrition