Distinguish between cryptogams and phanerogams
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Answer:
Cryptogams and phanerogams are two sub-kingdoms of the kingdom Plantae. This classification system was introduced by A. W. Eichler in 1883. The main difference between cryptogams and phanerogams is that Cryptogams consist of seedless plants whereas phanerogams consist of seed-bearing plants. Cryptogams comprise plants like algae, mosses, and ferns. Cryptogams are non-flowering plants, which mainly reproduce by the production of spores. They do not produce fruits. Phanerogams comprise gymnosperms and angiosperms. Gymnosperms are non-flowering plants with naked-seeds (seeds are not covered by a fruit). Angiosperms are flowering plants that produce seeds covered by a fruit. Angiosperms are the most prominent vegetation on earth.
Cryptogams refer to the seedless plants or plant-like organisms. Cryptogams form a sub-kingdom in the kingdom Plantae called Cryptogamae. The major characteristic of the Cryptogamae is that they reproduce by means of spores. Therefore, Cryptogams do not produce flowers, seeds or fruits. They consist of hidden reproductive organs. And Many plant bodies of Cryptogams are not differentiated into true leaves, stems, and roots. Many of them do not have a vascular system as well. The sub-kingdom Crytogamae is further divided into three phyla; phylum Thallophyta, phylum Bryophyta, and phylum Pteridophyta.
Thallophyta
Thallophyta consists of both unicellular and multicellular organisms. The multicellular body can be either thallus-like or filamentous. Thallophyta comprises organisms that belong to three kingdoms; kingdom Monera, kingdom Protista, and kingdom Fungi. The blue-green bacteria of the kingdom Monera belong to Thallophyta. In the kingdom Protista, all red, green, and brown algae belong to Thallophyta. Moreover, all fungi along with lichens belong to Thallophyta.
Figure 1: Common Orange Lichen
Bryophyta
Bryophyta consists of liverworts, mosses, and hornworts. Most bryophytes grow in wet, shady environments. They show alterations of generations along with a prominent gametophyte. The plant body is not differentiated into true stem, root, and leaves. Bryophytes are non-vascular plants.
Figure 2: Moss
Pteridophytes
Pteridophytes consist of ferns. Ferns are well-developed plants that grow in dry environments. They also grow in wet environments. Ferns show the alterations of generations along with a prominent sporophyte. Ferns are differentiated into true leaves, stem, and root. Ferns are vascular plants.
Phanerogams refer to the seed-bearing plants. The phanerogams are also called spermatophyte. Phanerogams form a sub-kingdom in the kingdom Plantae called Phanerogamae. The major characteristic of phanerogams is that they produce seeds. Phanerogams are vascular plants with differentiated boy structures into leaves, stem, and root. The sub-kingdom Phanerogamae is further divided into gymnosperms and angiosperms.
Gymnosperms
Gymnosperms are non-flowering plants that produce naked-seeds. Gymnosperms are monocots since they develop from a single seed-leaf. They are vascular plants with an unbranched, parallel vein system in the leaves. Gymnosperms can be divided into four phyla; phylum Cycadophyta, phylum Ginkophyta, phylum Coniferophyta, and phylum Gnetophyta.
Figure 4: Palm Seeds
Angiosperms
Angiosperms are flowering plants that produce a seed covered by a fruit. They can be either monocots or dicots. Angiosperms consist of a highly differentiated vascular system and they are the most prominent group of plants on earth. Their reproductive structure is the flower. They also show double fertilization. A passion flower and its fruit is shown in figure 5.
Figure 5: Passion Flower and Fruit
Similarities Between Cryptogams and PhanerogamsCryptogams and phanerogams are two classifications of the kingdom Plantae.Both Cryptogams and phanerogams are autotrophic eukaryotes.The cell wall of both Cryptogams and phanerogams contain cellulose.Both Cryptogams and phanerogams contain chlorophyll.Most Cryptogams and phanerogams are sessile.Difference Between Cryptogams and PhanerogamsDefinition
Cryptogams: Cryptogams refer to a plant or plant-like organisms that produce spores.
Phanerogams: Phanerogams refer to the higher plants that produce seeds.
Classification
Cryptogams: Cryptogams consist of Thallophyta, Bryophyta, and Pteridophyta.
Phanerogams: Phanerogams consist of gymnosperms and angiosperms.