Biological Classification Test - 9

Kingdom Protista includes unicellular, eukaryotic organisms only. Phycomycetes is a subdivision of fungus which are multicellular. Protozoa, slime molds and euglenoids are part of kingdom Protista.

Commonly known forms of basidiomycetes are mushrooms, bracket fungi or puffballs.

The walls of the diatoms are embedded with silica and thus the walls are indestructible.

In fungi like ascomycetes and basidiomycetes, an intervening dikaryotic stage (n + n i.e. two nuclei per cell) occurs; such a condition is called a dikaryon and the phase is called dikaryo phase of fungus.

The body of filamentous fungus is known as mycelium, which is a thread like structure. Mycelium produces hyphae and sporegenous cells to produce spores.

Cellular genes which are known to take part in producing cancer are called cellular oncogenes. Cancer is caused due to uncontrolled division of cells to produce tumor on body.

Fungi is important in nutrient cycle and acts as decomposer along with bacteria and mininerlisers of the biosphere to regular recycling of nutrients in the biosphere.

In fungus, the food reserve is glycogen and fat. Different fungi contain different kinds of reserve food materials depending upon habitat and body structure of fungus.

The mushroom belongs to class Basidiomyces to kingdom fungi. Basidiomycetes produce basidiospores as reproductive units. The member of this group grows on dead and decaying matters.

Bacteria belongs to kingdom Monera in which organism are unicellular and prokaryotic. Prokaryotic organisms lacks membrane bounded organelles like mitochondria where respiration occurs. In bacteria respiration occurs in mesosome.