Biological Classification
Test 2

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which of the following is NOT a characteristic of Kingdom Plantae?

Presence of cell wall
Autotrophic mode of nutrition
Heterotrophic members
Chlorophyll-containing cells
3

Kingdom Plantae primarily includes autotrophic organisms, but some parasitic plants exist. However, they are exceptions and not a general characteristic.

Which of the following organisms reproduces primarily by fragmentation?

Spirogyra
Paramecium
Amoeba
Mucor
1

Spirogyra reproduces asexually by fragmentation, where the filament breaks into smaller pieces that grow into new individuals.

Which of the following is an example of an obligate anaerobe?

Lactobacillus
Rhizobium
Clostridium
E. coli
3

Clostridium is an obligate anaerobe, meaning it can only survive in the absence of oxygen.

Which of the following statements is true about Mycoplasma?

They have a rigid cell wall
They are the smallest living cells
They possess a well-defined nucleus
They are obligate aerobes
2

Mycoplasma are the smallest living cells and lack a cell wall, making them highly flexible.

Which of the following is the primary reason why viruses are considered non-living outside a host?

They contain either DNA or RNA
They cannot replicate independently
They have a protein coat
They can mutate
2

Viruses lack cellular machinery for independent replication and require a host cell to reproduce.

Which of the following best explains why fungi are more closely related to animals than to plants?

They are heterotrophic
They contain chlorophyll
They have cellulose cell walls
They reproduce by seeds
1

Fungi, like animals, are heterotrophic and obtain their food by absorption, unlike plants that are autotrophic.

Which of the following structures is responsible for motility in bacteria?

Fimbriae
Pili
Flagella
Capsule
3

Flagella are whip-like structures that enable bacterial motility in liquid environments by rotating like propellers. Fimbriae and pili are hair-like structures used for attachment to surfaces or other cells, and pili can facilitate genetic exchange via conjugation, but they do not contribute to motility. The capsule is a polysaccharide layer that protects bacteria but is not involved in movement.

Which of the following statements about Kingdom Monera is incorrect?

All Monerans are unicellular.
Monerans have a well-defined nucleus.
Monerans reproduce mainly by binary fission.
Monerans lack membrane-bound organelles.
2

Monerans are prokaryotic organisms and lack a well-defined nucleus.

Which of the following kingdoms consists of organisms that are exclusively unicellular and eukaryotic?

Monera
Protista
Fungi
Plantae
2

Kingdom Protista includes unicellular eukaryotic organisms such as Amoeba, Euglena, and Paramecium.

Which of the following statements about Kingdom Monera is incorrect?

Monerans include both autotrophic and heterotrophic organisms.
Monerans lack membrane-bound organelles.
Monerans have a well-defined nucleus.
Monerans reproduce asexually by binary fission.
3

Monerans are prokaryotic organisms and lack a well-defined nucleus.

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