Here we will learn more about kingdoms of classification homework help
- Group 3 – Fungi:
Cell walls made up of complex protein called chitin
- Eukaryotic cells – either unicellular or multicellular
- Mode of nutrition – heterotrophic – may depend on dead and decaying matter and hence are called as saprophytes
- Some fungi live in symbiotic relationship with other fungi, algae, and plants. Example lichens
- Examples of organisms belonging to this group – yeasts and mushrooms (Figure 1)
Group 4 – Plantae:
- Eukaryotes with thick cell walls
- Mode of nutrition – autotrophic
- Examples of organisms belonging to this group – all plants
- Eukaryotes without cell walls
- Mode of nutrition – Heterotrophic
- Examples of organisms belonging to this group – all animals
Five kingdom classification:
Classification of the Plantae kingdom:
A criterion for classification of plant kingdom:
1. Does the plant body have well-differentiated and distinct components?
2. Does the differentiated plant have special tissues for transportation of water and minerals?
3. Does the plant have the ability to bear seeds and whether seeds are enclosed within the fruit?
Based on these criteria, the plants belonging to Plantae kingdom are classified into various classes.
Class 1 – Thallophyta:
- Lack of well-differentiated body components
- Mostly live in aquatic environment
- Plants belonging to this group are called as algae
Class 2 – Bryophyta:
- Plant body differentiated into stem- and leaf-like structure
- Amphibians – live on both land and water
- Lack of specialized tissue for transportation of water and minerals
- Plants belonging to this class are moss and Marchantia
Class 3 – Pteridophyta:
- Plant body is well-differentiated into root, stems, and leaves
- Presence of specialized tissue for transport and conduction of water and other substances
- Plants belonging to this class are ferns and horsetails
Common characteristic features of class 1, 2
- They have naked embryos called spores
- They have undifferentiated and hidden reproductive organs and hence are collectively called as cryptograms.