An analogy for the microtubules would be the framework of a building . The analogy would continue with the cargo elevator system to transport proteins within the cytoplasm.
A ribosome is like a honeybee as they both produce materials needed according to the directions given to them.
Ribosomes are like factories in a cell. They manufacture proteins using instructions the get from RNA.
This is one of the most common types of phytoplankton in the oceans. They are eukaryotic algae which can either be unicellular or exist in filamentous or ribbon-shaped colonies. Since they are food producers towards the lower end of the food chain in the oceans, their behavior can often reflect changes in their environments.
Microbes can live in almost any and every condition. Anywhere you go, you can find some kind of microbe that has adapted to living there.