Explanation:

Mycoplasma is a type of bacteria that is known as the "jokers of the plant kingdom" due to their unique properties and behavior. These bacteria are found in the kingdom Monera, which is a group of prokaryotic organisms that lack a true nucleus and other membrane-bound organelles.

Characteristics of Mycoplasma:

Mycoplasma is a unique type of bacteria that has several distinctive characteristics, including:

1. Smallest organisms: Mycoplasma are the smallest known free-living organisms that can replicate on their own.

2. No cell wall: Unlike other bacteria, mycoplasma lacks a cell wall, which makes them resistant to many antibiotics.

3. Pleomorphic: Mycoplasma has a unique shape that can change from a spherical to a filamentous shape.

4. Parasitic: Mycoplasma is responsible for a range of diseases in plants, animals, and humans.

Why are they called "jokers of the plant kingdom"?

Mycoplasma is known as the "jokers of the plant kingdom" because they are responsible for causing a range of diseases in plants, including:

1. Yellowing disease: Mycoplasma can cause yellowing of leaves in plants, which can lead to stunted growth and reduced crop yields.

2. Witches' broom disease: Mycoplasma can cause abnormal growth in plants, creating a "witches' broom" appearance.

3. Aster yellows disease: Mycoplasma can cause a range of symptoms in plants, including yellowing, stunting, and deformities.

These diseases can be difficult to diagnose and treat, making mycoplasma a challenge for plant growers and researchers.

Conclusion:

In conclusion, mycoplasma is a unique type of bacteria that lacks a cell wall and is responsible for causing a range of diseases in plants, animals, and humans. Due to their distinctive properties and behavior, they are known as the "jokers of the plant kingdom."

According to me mycoplasma are called jokers of the plant kingdom not monera kingdom due to the fact that if we closely look into the Monera kingdom we see archaebacteria and eubacteria which both are characterized by cell wall but although mycoplasma is a part of monera but it does not contain cell wall

practically we all come to conclusion that it should be said as jokers of monera kingdom but it isn’t

it is because according to me scientist havecompared it with plants at that time (because in earlier classification monerans comes under plant kingdom) that is why it is known as jokers of plant kingdom