Table of contents | |
Who classified living organisms? | |
Plant Kingdom: Plantae | |
Characteristics of Kingdom Plantae | |
Classification of Kingdom Plantae |
R.H. Whittaker gave the Five Kingdom classification for living organisms. He categorized living organisms based on multiple characteristics such as cellular structure, mode of nutrition, body organization, reproduction, phylogenetic relationship, etc. These five kingdoms were Monera, Protista, Fungi, Plantae and Animalia.
Kingdom Plantae includes all the plants. They are eukaryotic, multicellular and autotrophic organisms. The plant cell contains a rigid cell wall. Plants have chloroplast and chlorophyll pigment, which is required for photosynthesis.
The plant kingdom has the following characteristic features:
A plant kingdom is further classified into subgroups. Classification is based on the following criteria:
The plant kingdom has been classified into five subgroups according to the above-mentioned criteria:
Thallophytes lack a well-differentiated body structure and the plant body is thallus like.
Pteridophytes have a well-differentiated plant body into root, stem and leaves. They have a vascular system for conduction of water and other substances. Some of the common examples are Selaginella, Equisetum, Pteris, etc.
The plant kingdom is also classified into two groups:
1. Name the pigment responsible for photosynthesis in plants.
Ans. Chlorophyll is the pigment responsible for photosynthesis in plants.
2. Describe the criteria for levels of classification in plants.
Ans. The plant kingdom is further classified based on the following three criteria:
3. Explain the characteristic of Thallophytes.
Ans. Members of this class lack a well-differentiated body structure, or in other words, the body is not clearly divided into stem, leaves and roots.
4. Explain the significant features of Gymnosperms.
Ans. Gymnosperms include plants that possess a vascular system and a well-differentiated body structure. Furthermore, they bear seeds like the angiosperms, but they are not encased within a fruit. Hence, the term “Gymnosperm”, which is derived from Greek word, gymno = naked and Sperma = seed.
5. List the characteristics of Angiosperms.
Ans.
1. Who classified living organisms? |
2. What is the Plant Kingdom? |
3. What are the characteristics of Kingdom Plantae? |
4. What is the classification of Kingdom Plantae? |
5. What is the overview of the Plant Kingdom for NEET? |
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