Biological Classification
Test 1

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Who proposed the Five Kingdom Classification system?

Aristotle
Linnaeus
R. H. Whittaker
Dmitri Ivanowsky
3

R. H. Whittaker proposed the Five Kingdom Classification in 1969. The five kingdoms recognised in this system are Monera, Protista, Fungi, Plantae and Animalia.

Compared with many other organisms, bacteria as a group show which notable feature?

The least metabolic diversity
The most extensive metabolic diversity
Only photosynthetic nutrition
Only parasitic nutrition
2

Bacteria show the most extensive metabolic diversity. Some are photosynthetic or chemosynthetic autotrophs, while the vast majority are heterotrophs that depend on other organisms or dead organic matter for food.

Which combination correctly describes eubacteria?

A rigid cell wall and, if motile, a flagellum
No cell wall and no genetic material
A cellulose wall and membrane-bound nucleus
A protein-rich pellicle and two unequal flagella
1

Eubacteria, or true bacteria, are characterised by a rigid cell wall. Motile eubacteria possess a flagellum.

Which pigment makes cyanobacteria photosynthetic autotrophs?

Chlorophyll a
Haemoglobin
Melanin
Keratin
1

Cyanobacteria possess chlorophyll a, similar to green plants, and are therefore photosynthetic autotrophs. They may occur as unicellular, colonial or filamentous forms.

Which statement correctly describes members of Kingdom Protista?

They are primarily aquatic.
They are all multicellular.
They lack a well-defined nucleus.
They are exclusively parasitic.
1

Members of Kingdom Protista are primarily aquatic and are single-celled eukaryotes. Their cells contain a well-defined nucleus and other membrane-bound organelles.

Which fungal group may include coprophilous members that grow on dung?

Phycomycetes
Ascomycetes
Basidiomycetes
Deuteromycetes only
2

Ascomycetes may be saprophytic, decomposers, parasitic or coprophilous. Coprophilous fungi grow on dung.

Which fungus is extensively used in biochemical and genetic work?

Neurospora
Ustilago
Albugo
Gonyaulax
1

Neurospora is an ascomycete that is used extensively in biochemical and genetic work. Other examples of Ascomycetes include Aspergillus and Claviceps.

How is plasmogamy brought about in Basidiomycetes?

By fusion of two vegetative or somatic cells of different strains
By fusion of flagellated gametes inside water
By budding of a unicellular parent
By germination of conidia
1

Sex organs are absent in Basidiomycetes. Plasmogamy occurs through the fusion of two vegetative or somatic cells belonging to different strains or genotypes, producing a dikaryotic structure.

Which plant is mentioned as a parasite in Kingdom Plantae?

Cuscuta
Venus flytrap
Bladderwort
Chlorella
1

Cuscuta is mentioned as a parasitic plant. Bladderwort and Venus flytrap are examples of insectivorous plants, which are partially heterotrophic.

Which symptom may be produced by viral infection in plants?

Mosaic formation
Formation of heterocysts
Production of basidiocarps
Development of a gelatinous sheath
1

Plant viral infections may produce symptoms such as mosaic formation, leaf rolling and curling, yellowing, vein clearing, dwarfing and stunted growth.

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