Explain the kingdom fungi organisms, Biology

Explain the Kingdom Fungi organisms?

Kingdom Fungi consists of mostly eukaryotic, multicellular, non-photosynthetic organisms that derive their nutrients by absorption. Fungi are grouped separately from the other Kingdoms mainly because of their unique mode of nutrition. Not too long ago the fungi were grouped within Kingdom Plantae, since the cells of fungi are filamentous and have cell walls. Scientists now believe that the differences between fungi and plants are significant enough to merit placing them in their own kingdom. Fungi lack chlorophyl, and instead, secrete enzymes to dissolve food into smaller molecules, which can then be absorbed. This is known as a saprophytic life style. As such, fungi make up a large part of the decomposers in a food web.

The cell walls of fungi are not made of the same material contained within plant cell walls. Plant cell walls are composed of cellulose, while fungal cell walls are made of chitin, the material that makes up the shells of Arthropods. The vegetative body structure of a fungus consists usually of filaments called hyphae that grow through wood, penetrate the ground, or grow within the tissues of a host. These filamentous hyphae are sometimes walled off into cells by cross walls called septa. A mass of hyphae is referred to as a mycelium.

Many fungi reproduce sexually as well as asexually. Sexual reproduction in fungi occurs when two nuclei from two distinct mating strains fuse. In some fungi, the nuclei do not fuse right away but form pairs, making the hyphae dikaryotic, having two genetically different nuclei. Eventually the two nuclei will fuse and form (1N) spores through meiotic division. Asexual reproduction among fungi takes place through the production of spores formed from sporangia, or conidiospores formed from conidia.

The Fungi are divided into 3 Divisions:

Zygomycota - form characteristic zygospores, and include the bread molds

Ascomycota - form characteristic sac-like reproductive structures called asci, and include truffles, yeasts, morels, and molds

Basidiomycota - form characteristic basidia, which are club-shaped reproductive structures, and include mushrooms, toadstools, puffballs, bracket fungi, rusts, and smuts

We will examine Zygomycota (molds) and lichens, special organisms made of both a fungus and a plant, in greater detail.

Posted Date: 4/30/2013 2:20:36 AM | Location : United States







Related Discussions:- Explain the kingdom fungi organisms, Assignment Help, Ask Question on Explain the kingdom fungi organisms, Get Answer, Expert's Help, Explain the kingdom fungi organisms Discussions

Write discussion on Explain the kingdom fungi organisms
Your posts are moderated
Related Questions
Explain Turnover number Turnover number:- The  number  of  molecules  of substrate  transformed per catalytic  site of the enzyme per minute,

Composition The present day composition of atmosphere is the product of a lengthy evolutionary process that began more than four billion years ago. It is composed of a mixture

Explain the Swab Method? Swab method is the oldest and widely used method in food and dairy industry and was developed by W.A. Manheimer and T. Ybanez in 1917. A sterile cotton

Why is the fish circulation classified as a simple and complete circulation? Complete circulation is that in which there is no mixture of venous blood and arterial blood. As ci

Hybrid sterility can be regarded as yet another form of interspecific sterility. The offspring of the interspecific crosses are mainly sterile. Geological studies have shown that t

Explain the Presumptive Test - Most Probable Number Test? The Presumptive test is used to detect and estimate coliform population of a water sample. This test is carried out by

During a fever in a human, A. shivering can happen when the actual body temperature is higher than the set point for body temperature during the fever. B. the control system

how does epigenetic controls transcription?

Seed Germination - Development of plant The environmental factors that influence the germination of seeds are: Water availability, Optimal light, Aeratio

Environmental impact assessment consists of 4 phases which are as follows: (i)  Organizing the job. (ii)   Performing the assessment. (iii) Writing the environmental impac