Reproduction-a) Vegetative b) Sexual 10.5.

It also helps in retaining high soil acidity which is required for economically important decorative plants. Diatomaceous earth is obtained from ----- a) Diatom b) Sargassum c) Ulothrix d) Spirogyra 2.

The cryptogams are an example of a group that is impossible to squish into a single taxonomic category. Flag this item for. Division – Lycophyta . 3.1. Genus – Selaginella . EMBED (for wordpress.com hosted blogs and archive.org item tags) Want more? share. Systematic position 10.2. Their pollination services are crucial for the mankind, the Global ecosystem and food production. There are early free-sporing tracheophytes - pteridophytes or cryptogams - and seed plants ; we are just beginning to fully understand how all these vascular plants are related to each other. What Is the Economic Importance of Fungi?

Honeybee Economics: Implications for Ecology Policy* Abstract For thousands of years, humans have known the value of honeybees in agriculture. Ferns, horsetails (often treated as ferns), and lycophytes (clubmosses, spikemosses, and quillworts) are all pteridophytes. Advanced embedding details, examples, and help! 1. Besides being a lower plant, pteridophytes are economically very important. External and internal morphology of gametophyte. Cryptogams and the Western Australian Flora. A pteridophyte is a vascular plant (with xylem and phloem) that disperses spores.Because pteridophytes produce neither flowers nor seeds, they are sometimes referred to as "cryptogams", meaning that their means of reproduction is hidden. Here are five things you should know about the pivotal role of education in economic development: Education is an investment The importance of knowledge and learning has been recognized since the beginning of time. The following points highlight the top sixteen economic importance of algae. Strictly applied, the word cryptogam refers to all plants which reproduce by spores rather than seeds. Economic Importance. The importances of bryophytes are: The mosses, liverworts and lichens are the pioneers in establishing vegetation. Agar- agar is obtained from ----- a) Ulothrix b) Spirogyra c) Gracillaria d) Nostoc 4 Marks Questions: 1. 4. favorite. Occurrence 10.3. Algae occur in fresh water, hot water streams, sea, on moist land (soil), stems of plants and stones. Answer to: Why are ferns called vascular cryptogams?

Vascular plants are often called Tracheophytes and are thought to represent a natural group, that is, they are each others closest relatives and are all descendents from a common ancestor. 10.4. Economic analysis is important in order to understand exact condition of an economy. Selaginella . 1.2 The World Economy Pteridophytes Used as Medicine- - - - - - 14 ... playing an important link in the evolution from cryptogams (algae and bryophytes) to phanerogams (gymnosperms and angiosperms). Economic analysis is a process whereby strengths and weaknesses of an economy are analyzed. 9.4. Of some importance is that most families are leptosporangiate (based on 1 cell layer in sporangium, presence of an annulus), whereas a few (Ophioglossaceae for example) are eusporangiate (based on 2+ cell layers in sporangium, no annulus). Chapter: 6 Economic Importance of Algae 2 Marks Questions: 1. He has made several important contributions in the fields of historical linguistics and evolutionary sociopolitics as well. Understanding the phenomenon of Nutritional Adaptation in Plants Get complete information on the Classification of Cryptogams Get … Fungi have several positive economic effects, such as consuming biodegradable waste, improving soil, acting as symbiotic organisms for various crops, generating antibiotics and other medicines, and being a … Haeckel (1866) called these groups of plants as “Pteridophytes” because of their pinnate or feather-like fronds (leaves). The Pteridophytes are known to be of high economic importance. ADVERTISEMENTS: Cryptogams in India. Selaginella is commonly called ‘spike moss’. The Economic importance of Pteridophyte is given in Table 2.4 . They are distributed in humid temperate and tropical rain forests. ; The sphagnum plants are of great ecological importance.Dried up sphagnum is used as an absorbent in surgical dressings as well as packing materials in the upholstery. Economic Importance of Pteridophytes- - - - - 14.