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Diversity in Living Organisms : Previous Year Questions


1 Mark Questions

Q.1  Name the term which is used for the following : -
(i) The left and right halves of the body have the same design.
(ii) Animal tissue differentiated from the three embryonic germ layers.                      

[Board, 2012]

(i) Bilateral symmetry
(ii) Triploblastic


Q.2   Shyam knew the correct scientific name of Mango, but did not follow the conventions while writing it and wrote it as Mangifera Indica. Rewrite the scientific name as per the conventions.

[Board, 2012]

Mangifera indica.


Q.3   What is the lowermost category in the hierarchy of classification of groups of organisms?        

[Board, 2012]

Species.


Q.4   Name the phylum in which the animals have water vascular system.

[DAV 2006]

Echinodermata.

 

2 Marks Questions

Q.5   The body of an organism is streamlined and has feathers on its body. Identify the organism and write one specific feature of it.

[Board, 2014]

Aves.
Specific feature of Aves is that they are warm –blooded having a four chambered heart and modified forelimbs for flight
.


Q.6   An animal is dorsoventrally flattened. It has three embryonic germ layers and is acoelomate. Which phylum does it belong to? What are they commonly called? Give one example. 

[Board, 2012]

The animal belongs to phylum Platyhelminthes.
They are commonly known ‘flatworms’.

One example – Planaria or liver fluke or tape worm.


Q.7   What is a parasite? Give two examples.                                           

[Board, 2012]

A parasite lives in a close relationship with another organism, its host, and causes it harm. The parasite is dependent on its host for its life functions. E.g., Head lice, leech, bed bug.


Q.8    Kingdom Fungi have cell wall, but still it cannot be classified under kingdom Plantae? Give any two reasons.                     

[Board, 2012]

Fungi are not classified in plant kingdom because their cell wall is different from plant cell and is made up of chitin. They also lack chlorophyll and hence cannot do photosynthesis and are autotrophic.


Q.9    (a) Name and define the mode of nutrition in Mushroom.
(b) Name the symbiotic life form, which is seen as slow, growing large, coloured patches on the bark of trees.

[Board, 2012]

(a) Saprophytic nutrition -
Organisms feed on dead or decaying organic matter are called saprophytes and their mode of nutrition as saprophytic nutrition (In Greek- ‘Sapros’ means rotten and ‘trophos’ means feeder). 

(b) Lichen.


Q.10 The cat, platypus and man are all mammals, yet one of the most unique features of mammals helps to divide them into two groups. What is that feature? Mention two other characteristic features that are common to all the three animals.                     

[Board, 2012]

(a) Both cat, platypus are oviparous. Oviparous animals are animals that reproduce by laying eggs while man is viviparous. Viviparous animals bear live young that have developed inside the mother's body.

(b) Characteristics of mammalia-
i) They are warm blooded animals
ii) Mammary glands for the production of milk for their off springs



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