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Biological Classification is an important chapter in Class 11 Biology that helps students understand the diversity of living organisms. This test includes 10 multiple-choice questions covering topics such as Kingdom Plantae, Monera, Protista, fungi, bacteria, and viruses. These questions are highly useful for quick revision and exam preparation.

Characteristics of Kingdom Plantae

Kingdom Plantae mainly includes autotrophic organisms that perform photosynthesis with the help of chlorophyll. They have a well-defined cell wall made of cellulose. The correct answer to the first question is that heterotrophic members are not a characteristic of Plantae, as plants are primarily autotrophic.

Reproduction in Organisms

Some organisms reproduce through fragmentation, where the body breaks into parts and each part grows into a new individual. Spirogyra is a classic example of this type of reproduction, making it the correct answer.

Obligate Anaerobes

Obligate anaerobes are organisms that cannot survive in the presence of oxygen. Clostridium is an example of such organisms. These bacteria thrive in oxygen-free environments and are important in both medical and ecological contexts.

Mycoplasma Characteristics

Mycoplasma are the smallest living cells known. They lack a cell wall, which makes them unique among bacteria. The correct statement is that they are the smallest living cells, and they can survive without a rigid cell wall.

Nature of Viruses

Viruses are considered non-living outside a host because they cannot replicate independently. They require a host cell to reproduce and carry out life processes. This makes them unique at the boundary of living and non-living entities.

Relationship Between Fungi and Animals

Fungi are more closely related to animals than plants because they are heterotrophic. Unlike plants, fungi cannot produce their own food and depend on organic matter for nutrition.

Motility in Bacteria

Bacterial movement is mainly carried out by flagella. These are whip-like structures that help bacteria move in their environment. Hence, flagella are responsible for motility.

Incorrect Statements About Monera

Monerans are unicellular organisms that lack a well-defined nucleus and membrane-bound organelles. Therefore, the statement that Monerans have a well-defined nucleus is incorrect.

Kingdom Protista

Kingdom Protista includes organisms that are unicellular and eukaryotic. These organisms have a true nucleus and membrane-bound organelles, distinguishing them from Monera.

Key Concept of Monera

Monerans can be both autotrophic and heterotrophic, and they reproduce mainly through binary fission. However, they do not have a well-defined nucleus, which makes that statement incorrect in the final question.