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Two subkingdoms Cryptogamae and Phanerogamae
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- Answers: Based on the system of classification proposed by A. W. Eichler (1875 -78), the plant kingdom is divided into two subkingdoms Cryptogamae and Phanerogamae. The cryptogams are flowerless (non-flowering) and seedless, spore-bearing plants. Phanerogams are flower bearing, seed producing tracheophytes.
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Answers: Based on the system of classification proposed by A. W. Eichler (1875 -78), the plant kingdom is divided into two subkingdoms Cryptogamae and Phanerogamae. The cryptogams are flowerless (non-flowering) and seedless, spore-bearing plants.
- Bryophytes are so called because even though they are terrestrial plants, they require water for their fertilization process. The sperms are carrie...
- Amphibians are organisms, which can survive both in water and on land but they require water for sexual reproduction. Pteridophyte includes terrest...
- Based on the system of classification proposed by A. W. Eichler (1875 -78), the plant kingdom is divided into two subkingdoms Cryptogamae and Phane...
- On the basis of presence or absence of flowers and seeds, Eichler classified plant kingdom into two sub-kingdoms namely Cryptogamae (absence of flo...
- Figure \(\PageIndex{1}\): Alternation of generations between the haploid (1n) gametophyte and diploid (2n) sporophyte is shown. (credit: modification of work by Peter Coxhead)
- Figure \(\PageIndex{2}\): This life cycle of a fern shows alternation of generations with a dominant sporophyte stage. (credit "fern": modification of work by Cory Zanker; credit "gametophyte": modification of work by "Vlmastra"/Wikimedia Commons)
- Figure \(\PageIndex{3}\): This life cycle of a moss shows alternation of generations with a dominant gametophyte stage. (credit: modification of work by Mariana Ruiz Villareal)
- Figure \(\PageIndex{4}\): This apple seedling is an example of a plant in which the apical meristem gives rise to new shoots and root growth.
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A plant kingdom is further classified into subgroups. Classification is based on the following criteria: 1. Plant body: Presence or absence of a well-differentiated plant body. E.g. Root, Stem and Leaves. 2. Vascular system: Presence or absence of a vascular system for the transportation of water and other substances. E.g. Phloem and Xylem. 3. Seed...
Thallophytes lack a well-differentiated body structure and the plant body is thallus like. Thallophyta includes plants with primitive and simple body structures. The plant body is thallus, they may be filamentous, colonial, branched or unbranched. Examples include green algae, red algae and brown algae. Common examples are Volvox, Fucus, Spirogyra,...
Bryophytes do not have vascular tissues. The plant body has root-like, stem-like and leaf-like structures. Bryophytes are terrestrial plants but are known as “amphibians of the plant kingdom” as they require water for sexual reproduction. They are present in moist and shady places. Bryophyta includes mosses, hornworts and liverworts. Some of the co...
Pteridophytes have a well-differentiated plant body into root, stem and leaves. They have a vascular system for the conduction of water and other substances. Some of the common examples are Selaginella, Equisetum, Pteris, etc. More Details: Pteridophyta
Gymnosperms have a well-differentiated plant body and vascular tissues. They bear naked seeds, i.e. seeds are not enclosed within a fruit. Some of the common examples of gymnosperms are Cycas, Pinus, Ephedra, etc.
Angiosperms are seed-bearing vascular plants with a well-differentiated plant body. The seeds of angiosperms are enclosed within the fruits. Angiosperms are widely distributed and vary greatly in size, e.g. Wolffia is small measuring about 0.1 cm and Eucalyptus trees are around 100 m tall. Angiosperms are further divided into monocotyledons and dic...
Sep 30, 2021 · Depending on which classification system you are using, the plant kingdom has anywhere from ten to 14 divisions. Divisions of plants are equal in taxonomic rank to phyla in the animal kingdom; in other words, phyla are below kingdom and above class in a hierarchical structure.
The Plant kingdom can be divided into: Flowering plants produce flowers for reproduction, eg sunflowers and grass plants. Non-flowering plants reproduce using spores, eg ferns and mosses. Next...
Sep 30, 2019 · The plant kingdom is the largest group of living organisms. It has 5 major divisions like the thallophytes, bryophytes, pteridophytes, gymnosperms and angiosperms.
Jan 21, 2020 · The plant kingdom can be divided into groups based on plant structures. Plants with similar structures are grouped together. In the plant kingdom, these groups are called divisions .
