Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
At a stage of their cycle, Ascomycetes fungi produce the fruiting bodies like apothecium, perithecium and cleistothecium. How are these three types of fruiting bodies different from each other?
The fruiting bodies of Ascomycetes are called ascocarps. A fertile layer called hymenium bears asci. These fruiting bodies are different from each other in following ways (i) Cleistothecium Closed ascocarp, i.e.. ascocarp with no (ii) Perithecium Flask-shaped ascocarp with an apical pore called ostiRead more
The fruiting bodies of Ascomycetes are called ascocarps.
See lessA fertile layer called hymenium bears asci. These fruiting
bodies are different from each other in following ways
(i) Cleistothecium Closed ascocarp, i.e.. ascocarp with
no
(ii) Perithecium Flask-shaped ascocarp with an apical
pore called ostiole.
(iii) Apothecium Cup-shaped open ascocarp.
Explain the following terms in relation to Phycomycetes.
(i) Mycelium Mycelium is coenocytic and non-septate or aseptate. Septa are formed only in connection with separation of old senescent parts and delimitation of reproductive structures. (ii) Eucarpy and holocarpy In eucarpy, only a portion of sornatic body is transformed into reproductive body. In hoRead more
(i) Mycelium Mycelium is coenocytic and non-septate
See lessor aseptate. Septa are formed only in connection with
separation of old senescent parts and delimitation of
reproductive structures.
(ii) Eucarpy and holocarpy In eucarpy, only a portion
of sornatic body is transformed into reproductive body.
In holocarpy, transformation of the whole somatic
body into reproductive structure is found in only some
primitive forms.
(iii) Asexual reproduction It involves the formation of
sporangia. The sporangia function as conidia in dry
habitats as zoosporangia under wet conditions.
Write a brief account of reproduction in fungi.
Reproduction in fungi occurs by asexual and sexual methods. Asexually, it takes place either by formation of motile spores (zoospores) or by formation of non-motile spores (aplanospores) or conidia. In lower fungi like Phycomycetes, sex organs like the unicellular antheridia (male) and unicellular oRead more
Reproduction in fungi occurs by asexual and sexual
See lessmethods. Asexually, it takes place either by formation of
motile spores (zoospores) or by formation of non-motile
spores (aplanospores) or conidia. In lower fungi like
Phycomycetes, sex organs like the unicellular antheridia
(male) and unicellular oogonia (female) are produced. In
higher fungi like Basidiomycetes, sex organs are absent
but sexual process is present. Ascomycetes and
Basidiomycetes fungi produce fruiting bodies by sexual
process called ascospores and basidiospores,
respectively.
Briefly describe the life cycle phases of fungi.
All fungi pass through two phases or stages in their life cycle. These phases are vegetative or assimilative phase and reproductive phase. Vegetative phase In this phase, they go speedily in the food giving substratum. The food substratum may be bread, cheese, wood, etc. Coprophilous fungi grow wellRead more
All fungi pass through two phases or stages in their life
See lesscycle. These phases are vegetative or assimilative phase
and reproductive phase.
Vegetative phase In this phase, they go speedily in
the food giving substratum. The food substratum may
be bread, cheese, wood, etc. Coprophilous fungi grow
well on cow dung, dead parts of plants like fallen
leaves.
Reproductive phase In this phase, erect hyphae
develop which produce reproductive structure. In
unicellular yeasts, the entire cell becomes a
reproductive structure. This is the holocarpic condition.
In other fungi, reproductive structures develop from a
part of the vegetative body and the condition is called
eucarpic.
How do fungi form partnership with most plants?
Some fungi have evolved essential relationships with the roots of many living plants. These fungi grow around and into the roots. Both partners benefit so that neither would thrive without the other. This partnership is called mycorrhizal symbiosis.
Some fungi have evolved essential relationships with the
See lessroots of many living plants.
These fungi grow around and into the roots. Both
partners benefit so that neither would thrive without the
other. This partnership is called mycorrhizal symbiosis.
Lichens play important role in biological succession and soil formation. Justify.
Lichens growing on rocks secrete organic acids like oxalic acid. The acids enter the rock and produce a number of honey comb-like small crevices. Dust and organic matter collect in the crevices. Mass spores are able to grow over such crevices and start the process of succession and soil formation.
Lichens growing on rocks secrete organic acids like
See lessoxalic acid. The acids enter the rock and produce a
number of honey comb-like small crevices. Dust and
organic matter collect in the crevices. Mass spores are
able to grow over such crevices and start the process of
succession and soil formation.
Which type of fungi are also called bracket fungi?
Bracket or shelf fungi are lignocolous fungi which produce bracket or shelf-shaped, hard, leathery basidiocarps that are found to come out from the tree trunk on loss of wood, e.g., Fomes tomentarius, etc.
Bracket or shelf fungi are lignocolous fungi which
See lessproduce bracket or shelf-shaped, hard, leathery
basidiocarps that are found to come out from the tree
trunk on loss of wood, e.g., Fomes tomentarius, etc.
What is the characteristic feature of class-Ascomycetes?
Ascospore formation is the characteristic of class-Ascomycetes. Ascospores are a type of non-motile meiospores which are produced inside special sacs called asci (sing. ascus). An ascus often contains 8 ascospores because meiosis is accompanied by one mitotic division.
Ascospore formation is the characteristic of
See lessclass-Ascomycetes. Ascospores are a type of non-motile
meiospores which are produced inside special sacs
called asci (sing. ascus). An ascus often contains 8
ascospores because meiosis is accompanied by one
mitotic division.
Neurospora, an Ascomycetes fungus has been used as a biological tool to understand the mechanism of plant genetics much in the same way as Drosophila has been used to study animal genetics. What makes Neurospora as a genetic tool?
Neurospora (pink bread mould) is often called Drosophila of plant kingdom. It is haploid in nature which helps in immediate expression of every mutation. Beadle and Tatum used it as an experimental tool to find out that genes express their effect through synthesis of specific enzymes.
Neurospora (pink bread mould) is often called Drosophila
See lessof plant kingdom. It is haploid in nature which helps in
immediate expression of every mutation. Beadle and
Tatum used it as an experimental tool to find out that
genes express their effect through synthesis of specific
enzymes.
What are bacteriophages and their types? Identify their shape.
Bacteriophages are viruses which kill bacteria. They are numbered T1 to T7, as their types. The shape of bacteriophages is tadpole-like with a head and a tail.
Bacteriophages are viruses which kill bacteria. They are
See lessnumbered T1 to T7, as their types. The shape of
bacteriophages is tadpole-like with a head and a tail.