Question

Which of the following contains actinomycetes?
A) Kingdom Monera
B) Kingdom Fungi
C) Kingdom Plantae
D) Kingdom Protoctista

Answer 1

Hint: Actinomycetes are a group of gram-positive anaerobic bacteria. It usually possesses a filamentous structure with branching growth. Its pattern of growth is in such a way that it forms colonies later. For mobility, it requires flagella.

Complete answer:
Let us analyze the given options:
A) Kingdom Monera- This kingdom contains single-cell prokaryotic organisms like bacteria and filamentous actinomycetes and photosynthetic blue-green algae. They are all microscopic forms. The nucleus and other organelles are without the enclosing membranes. Genetic material is circular DNA, occurring naked in the cytoplasm.

B) Kingdom Fungi- This kingdom includes diverse kinds of eukaryotic, predominantly multicellular, heterotrophic organisms. Some of them are one-celled like yeast while others are complex like mushrooms.

C) Kingdom Plantae- This kingdom comprises multi-cellular and photosynthetic producers. They are primarily aquatic red, brown and green algae and the land plants- bryophytes and tracheophytes. Vascular plants include the ferns, gymnosperms and angiosperms.

D) Kingdom Protoctista- This kingdom includes the unicellular as well as the multi-cellular organisms. They are either single cell or live in the colony. They belong to moist and terrestrial habitat. They include- protozoa, algae, dinomastigota, oomycete and slime mould.

Therefore the correct answer is option ‘A’.

Note:
i) Kingdom Monera includes the major decomposers of most ecosystems and helps in the recycling of nutrients.
ii) Many monerans are said to cause various diseases like diphtheria, pneumonia, tuberculosis and leprosy. These are even used in the manufacturing of antibiotics to cure many diseases.