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Diversity in Living World - 2

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Which of the following organisms is correctly matched with its particularly named taxonomic category?

  1. Human - Homo, an order

  2. Tiger - Carnivora, a class

  3. Housefly - Musca, a genus

  4. Devil fish - Mollusca, a class


Correct Option: C
Explanation:

Musca is the genus name of housefly.

______ are associated with defense in protozoans.

  1. Nematocysts

  2. Statocysts

  3. Trichocysts

  4. Otocysts


Correct Option: C
Explanation:

Trichocyst - A stinging or grasping organ in the outer cytoplasm of certain protozoans, especially ciliates.

Which of the following is a matching set of phylum and its three examples?

  1. Platyhelminthes - Planaria, Schistosoma and Enterobius

  2. Mollusca - Loligo, Teredo and octopus

  3. Porifera - Spongilla, Euplectella and Pennatula

  4. Cnidaria - Bonellia, Physalia and Aurelia


Correct Option: B
Explanation:

 All these belong to mollusca.

To which of the following categories does methanogens belong?

  1. Archaebacteria

  2. Cyanobacteria

  3. Phototropic bacteria

  4. Putrefaction bacteria


Correct Option: A
Explanation:

These are the ancient bacteria that can produce methane gas used in biogas plants.

Motile cells are completely absent in the life cycle of

  1. noctiluca

  2. ulothrix

  3. anabaena

  4. oedogonium


Correct Option: C
Explanation:

It is a cyanophycean. Hence, no motile cells in its life cycle.

Which of the following is not included in the five kingdom classification of R. H. Whittaker?

  1. Monera

  2. Virus

  3. Fungi

  4. Protista


Correct Option: B
Explanation:

In the five kingdom classification of Whittaker, there is no mention of these acellular organisms.

What is the process of fusion of protoplasms between two motile or non-motile gametes called?

  1. Karyogamy

  2. Xenogamy

  3. Plasmogamy

  4. Autogamy


Correct Option: C
Explanation:

The process of fusion of protoplasms between two motile or non-motile gametes is called plasmogamy.

Which of the following are the locomotory organelles in protozoa?

  1. Setae

  2. Cilia

  3. Flagella

  4. Pseudopodia


Correct Option: D
Explanation:

Pseudopodia means false feet that are seen in protozoa.

Bryophytes resemble algae in most aspects, except the

  1. presence of thalloid plant body

  2. presence of vegetative reproduction

  3. dependence on water for fertilisation

  4. presence of jacketed and multicellular sex organs


Correct Option: D
Explanation:

Sex organs are well developed and multicellular. 

A bacterium with numerous flagella all around is

  1. monotrichous

  2. lophotrichous

  3. amphitrichous

  4. peritrichous


Correct Option: D
Explanation:

A bacterium with numerous flagella all around is peritrichous.

To which of the following categories does the protein rich spirulina belong?

  1. Chlorophycae

  2. Mycoplasma

  3. Blue-green algae

  4. Bacteria


Correct Option: C
Explanation:

Spirulina is the member of the cyanobacteria which are prokaryotic.

Presence of a bladder is the common feature of

  1. Teleostomi

  2. Agnathostomes

  3. Holocephali

  4. Elasmobranchii


Correct Option: A
Explanation:

Teleost fishes (bony fishes) have developed an air bladder attached to the digestive system. It helps to give buoyancy.

'Watermelon snow' is caused due to

  1. Trichodesmium

  2. Gonyulaux

  3. Chlamydomonas nivalis

  4. Red algae


Correct Option: C
Explanation:

It causes 'Red snow'. Its hypnospores consist of a red colour pigment, which gives the colour to snow.

Which of the following statements about protistan algae are incorrect? A. They are heterotrophic and one of the major components of phytoplanktons. B. They are only neustonic in nature. C. The cell is surrounded by a cell wall and possesses gelatinous matrix around the cell wall. D. Distinct chloroplasts are absent. E. Pyrenoids are present in protistan algae.

  1. A, B and D

  2. B, D and E

  3. A, B and E

  4. C, D and E


Correct Option: A
Explanation:

Statement A is not true because they are autotrophic. Statement B is not true because they are found in fresh water, marine water, benthic and neustonic regions. Statement D is not true because they have a distinct chloroplast for photosynthesis.

From which of the following bacteria is the hallucinogenic drug, LSD obtained?

  1. Claviceps purpurea

  2. Saccharomyces cerevisiae

  3. Penicillium notatum

  4. Rhizopus nigrican


Correct Option: A
Explanation:

Lysergic acid diethylamide (LSD) is obtained from this fungi.

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