Diversity in Living Organisms - I (2016)

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Which of the following organisms has mucus glands in the skin?

  1. Scoliodon

  2. Frog

  3. Anabas

  4. Seahorse

Correct Option: B

Amphibians have a three-chambered heart and not four. All other options are correct.

Which of the following organisms possesses pseudocoelom?

  1. Liverfluke

  2. Tapeworm

  3. Nereis

  4. Ascaris

Correct Option: D

 Elephantiasis refers to a parasitic infection that causes extreme swelling in arms and legs. This disease is caused by filarial worm.

Which of the following organisms respires through gills?

  1. Seahorse

  2. Lizard

  3. Turtle

  4. Pigeon

Correct Option: A

There are many kinds of fish, some with skeletons made entirely of cartilage, such as sharks, and some with a skeleton made of both bone and cartilage, such as tuna or rohu.

Which of the following organisms are called amphibians of the plant kingdom?

  1. Thallophytes

  2. Bryophytes

  3. Pteridophytes

  4. Angiosperms

Correct Option: B

Bryophytes are called the amphibians of the plant kingdom. The plant body is commonly differentiated to form stem and leaf-like structures.

Which of the following is/are not a characteristic feature of pteridophytes?

  1. Conductive tissues

  2. Naked embryo

  3. Well-differentiated reproductive tissues

  4. Well-differentiated plant body

Correct Option: C

Thallophytes, bryophytes and pteridophytes have naked embryos that are called spores.

Which of the following organisms is not a protochordate?

  1. Balanoglossus

  2. Herdemania

  3. Amphioxus

  4. Echinus

Correct Option: D

Protochordates are bilaterally symmetrical, triploblastic and have a coelom.

Which of the following reptiles has a four-chambered heart?

  1. Chameleon

  2. Turtle

  3. Crocodile

  4. King cobra

Correct Option: C

Crocodile is the only reptile that has a four-chambered heart.

Which of the following organisms possesses specialised conductive tissues?

  1. Riccia

  2. Marchantia

  3. Funaria

  4. Marsilea

Correct Option: D

The plant body of Marsilea is differentiated into roots, stem and leaves and has specialised tissue for the conduction of water and other substances from one part of the plant body to another.

Which of the following is a flowering plant?

  1. Ipomoea

  2. Marsilea

  3. Cycas

  4. Pinus

Correct Option: A

Angiosperms are called flowering plants. Ipomoea is an example of angiosperms.

Which of the following is not a characteristic feature of platyhelminthes?

  1. Bilateral symmetry

  2. True coelom

  3. Triploblastic

  4. Dorsoventrally flattened body

Correct Option: B

Flatworms are acoelomates. There is no true internal body cavity or coelom in which well-developed organs can be accommodated. 

Which of the following is/are not a characteristic feature of echinoderms?

  1. Spiny skin

  2. Water vascular system

  3. Radial symmetry

  4. Jointed legs

Correct Option: D

 Jointed legs are a characteristic feature of Arthropods. (the word ‘arthropod’ means ‘jointed legs’)

Which of the following organisms is characterised by a thallus-like body?

  1. Spirogyra

  2. Riccia

  3. Marchantia

  4. Aspergillus

Correct Option: A

Plants that do not have well-differentiated body are called thallophytes. Examples are Spirogyra, Ulothrix, Cladophora and Chara.

Which of the following plants bears naked seeds?

  1. Spirogyra

  2. Cladophora

  3. Pinus

  4. Funaria

Correct Option: C

Cycas is a gymnosperm. This term is derived from two Greek words: Gymno – meaning naked and Sperma – meaning seed. The plants of this group bear naked seeds and are usually perennial, evergreen and woody.

Which of the following correctly distinguishes monocots from dicots?

  1. Flowers of monocots are pentamerous, whereas flowers of dicots are trimerous.

  2. Leaves of monocots show parallel venation, whereas leaves of dicots show reticulate venation.

  3. Roots of monocots are adventitious, whereas roots of dicots are fibrous.

  4. Vascular bundles in the stem of monocots are arranged in a ring, whereas in the stem of dicots, they are scattered.

Correct Option: B

Cotyledons represent a bit of pre-designed plant in the seed. There can either be one cotyledon or two cotyledons.

Which of the following organisms is classified as coelenterate?

  1. Euplectella

  2. Spongilla

  3. Jelly fish

  4. Planaria

Correct Option: C

Sycon belongs to Porifera, which have pores all over the body. 

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