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What are the types of mycorrhiza?
Mycorrhiza can be of two types (i) Ectomycorrhiza (ii) Endomycorrhiza
Mycorrhiza can be of two types
See less(i) Ectomycorrhiza
(ii) Endomycorrhiza
An association between roots of higher plants and fungi is called
Mycorrhiza is a symbiotic association between a fungus and the root of a plant.
Mycorrhiza is a symbiotic association between a fungus
See lessand the root of a plant.
List the types of lichens.
Types of lichens are (i) Crustose (crust-like) (ii) Foliose (flat and lobed -like) (iii) Fruticose (branched-like a bush)
Types of lichens are
See less(i) Crustose (crust-like)
(ii) Foliose (flat and lobed -like)
(iii) Fruticose (branched-like a bush)
Which are the most advanced group of fungi?
Basidiomycetes (the club fungi) are the most advanced and most commonly seen fungi.
Basidiomycetes (the club fungi) are the most advanced and
See lessmost commonly seen fungi.
Give the name of a fungus which causes rust diseases.
Puccinia graminis tritici causes black stem rust of wheat.
Puccinia graminis tritici causes black stem rust of wheat.
See lessThe two gametangia come in contact and fuse to form a zygote in which event? Give two examples.
Gametangial copulation, e.g., Rhizopus, Mucor. etc,
Gametangial copulation, e.g., Rhizopus, Mucor. etc,
See lessA dikaryon is formed when.
Plasmogamy produces a dikaryotic cell or a cell with a pair of nuclei called dikaryon.
Plasmogamy produces a dikaryotic cell or a cell with a pair
See lessof nuclei called dikaryon.
What are dolipores? In which class of fungi are these present?
Dolipores or central pores are barrel-shaped outgrowths present in septa of class—Basidiomycetes (club fungi).
Dolipores or central pores are barrel-shaped outgrowths
See lesspresent in septa of class—Basidiomycetes (club fungi).
Name the scientist named as Father of Mycology
Micheli.
Micheli.
See lessWhat is the SUBVIRAL PATHOGENS?
SUBVIRAL PATHOGENS Viroids (satellite RNA) and prions belong to this category. TO Diener (1971) discovered a new infectious agent that was smaller than viruses and caused potato spindle tuber disease, Citrus exocortis disease. Viroids are small circular RNAs similar to viroids, but are located insidRead more
SUBVIRAL PATHOGENS
See lessViroids (satellite RNA) and prions belong to this
category.
TO Diener (1971) discovered a new infectious agent that
was smaller than viruses and caused potato spindle tuber
disease, Citrus exocortis disease.
Viroids are small circular RNAs similar to viroids, but are
located inside protein coat of a true virus. Virusoids
require the assistance of virus for their replication.
Viroids are free RNAs devoid of nucleoprotein coat. The
RNA has low molecular weight and is tightly folded into
circular or linear single-stranded structure while, prions
are obligate parasites made of glycoproteins only. They
are formed due to mutations in gene PRNP. Prions are
not affected by proteases, nucleases, temperature upto
8000C, UV radiations and formaldehyde.
These cause disease by accumulating in nervous tissue and
cause its degeneration. Some common diseases caused by
them are scrapie of sheep, mad cow disease, etc.