Cryptogams-Fungi (IFS Botany (Mains)): Questions 1 - 8 of 8

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Question number: 1

» Cryptogams » Fungi

Appeared in Year: 2015

Essay Question▾

Describe in Detail

What is the importance of VAM? (Paper-1, Section-A)

Explanation

Meaning of VAM

  • VAM means Vesicular Arbuscular Mycorrhizal.

  • Mycorrhiza is the product of an association between a fungus and plant root.

  • Vesicular arbuscular mycorrhiza (VAM) is a fungus and formed by the symbiotic association between certain phycomycetous fungi and angiosperm roots.

  • They help them to capture nutrients from the soil.… (222 more words) …

Question number: 2

» Cryptogams » Fungi

Appeared in Year: 2015

Essay Question▾

Describe in Detail

Describe the asexual reproduction in Penicillium. (Paper-1, Section-A)

Explanation

  • Penicillium is saprophytic fungus and grows on vegetative fruits, meat and many other moist.

Asexual reproduction

  • In Penicillium, asexual reproduction takes place by conidia which are developed on conidiospores.

  • Conidia are non-motile and asexual spores.

  • Conidia are produce at the tip of special, erect, hyphae called conidiophores.

  • Many crops of… (145 more words) …

Question number: 3

» Cryptogams » Fungi

Appeared in Year: 2015

Essay Question▾

Describe in Detail

What is the significance of aflatoxins? (Paper-1, Section-A)

Explanation

Meaning of aflatoxins:

Aflatoxin is a toxin which is produced by mold and that can damage the liver and lead to the liver cancer.

Aflatoxin is a naturally occurring mycotoxin produced by two types of mold: Aspergillus flavus and Aspergillus parasiticus.

Aflatoxins are highly toxic compounds and can cause both… (130 more words) …

Question number: 4

» Cryptogams » Fungi

Appeared in Year: 2015

Essay Question▾

Describe in Detail

How are the fungal toxins classified according to their source of origin? (Paper-1, Section-A)

Explanation

Defining Toxins:

  • Toxins are harmful products, which are produced by living organisms, bacteria plants or animals.

  • A toxin is a product of microorganism or of a microorganism host complex, which acts on living host protoplast to influence disease development or symptoms.

  • Toxins is an injurious substances produced by organisms.

Types… (125 more words) …

Question number: 5

» Cryptogams » Fungi

Appeared in Year: 2014

Essay Question▾

Describe in Detail

What are the different types of flagella found in fungi? (Paper A Section A)

Explanation

  • There are mainly two types of flagella;
Image showing flagella types.

Image Showing Flagella Types.

Based on cilia or hair and fibrils, flagella divided into two parts.

Tinsel type: Flagellum with a large number of hair like outgrowths (cilia) all around its surface.

Whiplash type: A long thread like structure being rigid at the… (143 more words) …

Question number: 6

» Cryptogams » Fungi

Appeared in Year: 2014

Essay Question▾

Describe in Detail

How significant is the parasexuality in Aspergillus? (Paper A Section A)

Explanation

Definition of parasexuality or parasexual cycle:

  • The parasexual cycle is defined as a cycle in which plasmogamy, karyogamy and meiosis take place but not at a specified time or at specified points in the life cycle of an organism.
  • In some fungi true sexual cycle comprising of nuclear fusion and… (175 more words) …

Question number: 7

» Cryptogams » Fungi

Appeared in Year: 2013

Essay Question▾

Describe in Detail

Differentiate between the following: Holocarpic and Eucarpic fungi (Paper 1, Section –A)

Explanation

In fungi, asexual reproduction is predominant and is depending upon the involvement of the entire thallus or a part of thallus, the fungi may be Holocarpic or Eucarpic.

Difference between Holocarpic and Eucarpic

Table showing the Difference between Holocarpic and Eucarpic

Holocarpic

Eucarpic

In Holocarpic fungi, the entire thallus gets… (107 more words) …

Question number: 8

» Cryptogams » Fungi

Appeared in Year: 2013

Essay Question▾

Describe in Detail

Discuss the following briefly: Explain the role of arbuscular mycorrhizal fungi as biofertilizer (Paper 1, Section A)

Explanation

  • Biofertilizers are the organic substances which make use of microorganisms to increase the fertility of soil. These fertilizers are not harmful to crops or other plants like the chemical fertilizers. They are actually taken from the animal wastes along with the microbial mixtures.

  • Arbuscular mycorrhizal (AM) fungi have the economic… (611 more words) …

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