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Dikaryotisation (n + n) in Agaricus is brought about by
In the fungus Agaricus, dikaryotisation (n + n) is brought about by two processes: clamp connections and somatogamy between two hyphae of different strains. Clamp connections allow the transfer of nuclei between adjacent cells, while somatogamy involves the fusion of two compatible hyphae.
'Red tide' is caused by
Which one of the following shows heterothallism?
Heterothalism was discovered by AF Blackeslee (1904) in Rhizopus stolonifer. In this phenomenon, fungi shows fusion of gametes which belong to genetically, morphologically and physiologically dissimilar mycelia normally referred as positive and negative strains.
Which one exhibits the character of a protozoan during one phase of its life cycle and character of fungi in another phase of its life cycle?
The slime moulds (or moulds) make up two unique and interesting phyla of kingdom-Protista. The cellular slime moulds are now classified with Protozoa (Amoeba) due to their evolutionay closeness and having amoeboid stage.
The other phyla of slime moulds are Plasmodial. Slime moulds belongs to Myxomycota.
Spirochaetes is/are
Spirochaetes are spiral-shaped or helically coiled bacteria belonging to the phylum Spirochaetes. They are gram-negative, motile, and have unique endoflagella enclosed within the outer sheath.
Clamp connection is found in
Clamp connections are specialized structures found in the hyphae of Basidiomycetes. They facilitate the transfer of nuclei during the sexual reproduction process, ensuring the maintenance of a dikaryotic state.
Diatoms do not decay easily because
Diatoms have unique double shells made up of opaline silica.
Erogotamine tartarate extracted from Claviceps, is used for cure of
Ergotamine tartrate is an ergot alkaloid derived from the fungus Claviceps purpurea, which infects rye and other cereals. It is primarily used in the treatment of migraine headaches and other vascular headaches.
These organisms are fungus like in one phase of their life cycle and Amoeba like in another phase of their life cycle
The slime molds make up two unique and interesting phyla of Protists. The cellular slime molds are now classified with the Amoebas because of their evolutionary closeness and because these slime molds have cellular amoboid stage. The other phyla of slime molds are the plasmodial slime molds or Myxomycota.
The first attempt for Biological classification was because of the need to use organisms for our own use. Here which kind of used are considered?
NCERT page number 16, para-1
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