Protista is the second kingdom which contains all the eukaryotic unicellular organisms. It is subdivided into different groups, which are, Crystophytes, Dinoflagellates, Slime moulds, Protozoans, and Euglenoids. In this article, we will talk about this kingdom and state some facts about protists, Protista examples, and characteristics of Protista and also discuss how protists obtain their energy.
What is a Protist?
Protista is the second kingdom and includes all the unicellular eukaryotic organisms. All these organisms which come under this kingdom are termed protists, they are neither plants, animals, fungi, nor bacteria. They are higher organisms When compared to bacteria but they are lower than all plants, animals, and fungi.
Characteristics of Protista
Characteristics of the organisms which come under this Kingdom and given below:
This Kingdom has various organisms that do not have much in common.
They are mainly unicellular microorganisms that are comparatively limited to the other eukaryotes
They have a relatively simple Eukaryotic cell system
Body Organisation of an Amoeba.
Facts About Protists
Some facts about The Kingdom Protista and mention here:
Plasmodium: the Malarial Parasite.
If the Amoeba is cut in such a manner that only one of its half has the nucleus. In contrast, the other half does not have a nucleus; the one with the nucleus will survive whereas the other one will die.
The organisms of this Kingdom can be divided into subclasses based on the type of movement they show.
They can have cilia or flagella or pseudopodia, which are false feet for movement
How Do Protists Obtain Their Energy?
Different members of the kingdom obtain energy differently. Some of them ingest their food and digest it internally, whereas some others digest their food externally, that is outside their body by using certain types of enzymes which are unique to them. Some of the members are also autotrophic, that is they make their food through processes like photosynthesis which is similar to higher plants. These organisms absorb solar energy and then convert it into their food.
Kingdom Protista Examples
Some examples of organisms from Kingdom Protista are:
We currently follow the five kingdom classification system which includes classifying all the organisms into five kingdoms namely Monera, Protista, fungus, plant and animals. Protista is the second Kingdom which includes organisms which are unicellular and other eukaryotes. These organisms are the lowest eukaryotes among all eukaryotes. This Kingdom also has subclasses that are cryptophytes, dinoflagellates, Slime moulds, Euglenoids and protozoans. all organisms have different methods of obtaining energy which may be internal digestion, External digestion or autotrophy.
State whether the statements mentioned below are true or not:
1. We currently follow the five-kingdom classification system.
2. Protists can have different means of movement which divides them into different groups.
3. Protista includes the most primitive type of organism.
Ans: False, the kingdom includes organisms with a higher level of organisation as compared to the kingdom monera whose sole members are bacteria.
Learn by Doing
Complete the given statements by filling in the blanks:
1. Protists can digest their food both __________ and __________.
Ans: internally, externally.
2. Choose the organisms which belong to the kingdom Protista from the list given below:
Slime moulds, ferns, yeast, mycoplasma, euglena, amoeba, and Plasmodium.
Ans: Slime moulds, euglena, amoeba and plasmodium.