Protist are considered the oldest living organisms. Protists are organisms that do not fit into any other group because they do not have characteristics that are common with plants, animals or fungi.
Protists are eukaryotic microorganisms and they have a simple cell structure.
Protists are classified by how they move. Some protists use tiny hair like substances to move through liquids. This is the same type of hair, cilia, that is found in a person’s nose.
Some protists have long tails and the tail can move around and help the protists move. The tail like structure is called flagella.
Other protists move by scooting or oozing. These types of protists, such as amoebas, use pseudopodia to move.
Protists eat differently. Some protists actually eat food and digest it inside of their organism, while others digest food outside of their organism and use enzymes to break the food down.
After the food is broken down, the protists eat the food that is now partially digested. Other protists use photosynthesis and make their own food.
There are different types of protists such as algae, mold and amoebas.
Algae is a very known protists and this is one type of protist that gets food from photosynthesis.
Algae have chlorophyll that makes them green and they use sunlight to help them to make their food, but they are not considered a plant because they do not have tissues that are like a plant.
Algae are different colors such as green, brown and red.
Mold is another type of protist that are also fungus. Some of the protists are unicellular which means that they only have one cell, and other molds are plasmodial which means that they are made from just one super large cell.
The plasmodial molds can get very large and very wide.
Amoebas are the third type of protists. Amoebas are unicellular organisms and the move by using pseudopods, or by using ooze to get around.
Amoebas have no shape and they eat their food with their bodies. Amoebas reproduce by splitting in two through a process called mitosis. Mitosis is when the cell divides in to two parts.