Biological Classification Test - 2

Rhizopus is a saprophytic fungus. It spoils food items such as bread, strawberries, apples etc. It is frequently observed growing on bread and is hence also called common bread mould.

In protozoans, locomotion occurs either by pseudopodia, cilia or flagella. Example: Amoeba has pseudopodia, paramoecium locomotes by cilia and trypanosome has flagella as their locomotory organs.

Puccinia is the genus of kingdom Fungi. It includes species of obligate parasites which cause serious infection called rust. These fungi cause rusty pustules on the aerial parts of crops.

Puccinia graminis tritici - black stem rust of wheat

Puccinia glumarum - yellow rust of wheat

Puccinia recondita - brown rust of wheat

R. H. Whittaker, an American ecologist, proposed the five kingdom classification. He divided organisms into five kingdoms—Monera, Protista, Fungi, Animalia and Plantae.

Lichens are a permanent symbiotic association between mycobiont, i.e. the fungal component, and phycobiont, i.e. the algal component.

Diatoms and desmids are placed under Chrysophytes (Kingdom: Protista).

Rhizopus belongs to zygomycetes of kingdom Fungi. Fungi which belong to the group zygomycetes show the presence of septate mycelium, sporangia at the tips of hyphae, sexual reproduction by conjugation and absence of non-motile zoospores.

An obligate parasite cannot complete its life cycle without a suitable host. Viruses infect a cell, take the machinery of the cell and replicate. Hence, they are intracellular obligatory parasites.

Noctiluca, Gymnodinium and Gonyaulax are dinoflagellates. Due to their rapid multiplication, the sea appears red which is known as red tide.

Bacteria are found in four shapes—cocci (spherical, ovoid shape), bacilli (rod-shaped), spirilla (spiral shaped/coiled) and vibrio (comma-shaped).