Class
IX Science Ch-07 Diversity in Living
Organisms Previous year Solved Questions
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✍ How to memorize classification
levels?
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Kingdom
➤
Phylum ➤ Class ➤ Order ➤
Family ➤ Genus ➤ Species |
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1
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Which group of plant is called cryptogamy? Give two
example
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1
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Ans
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Plants group with hidden reproductive organs are called
cryptogamy eg.algae, lichens,
mosses, etc.The thallophytes, the bryophytes and the pteridophytes(any one) |
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2
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What
are the modification produced by Car
Woese, in the classification proposed by Whittaker
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1
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Ans
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The
modification Woese divide the kingdom Monera into Archaebacteria (or
Archaea)
and Eubacteria (or Bacteria)
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3
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Name
one mammal that lay eggs
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1
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Ans
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The platypus and the echidna
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4
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Classify
the following into respective Phylum/class: jellyfish; Earthworm; cockroach;
Rat
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2
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Ans:
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Jellyfish
- Coelenterate
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Cockroach
- Arthropoda
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Rat
- Mammalian
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Earthworm
- Annelida
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5
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Select
the odd one out with respect to classification giving reason for your choice (a) Mango, Gram , rice, Apple (b) Prawn, Scorpion, Octopus, Butterfly
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2
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Ans:
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(a)
Rice – a monocotyledonous other are dicotyledonous
(b)
Octopus which belong to Mollusca other are Arthropoda
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6
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(a)
Give one characteristic difference between primitive and advanced organisms.
(b)
Name the phylum to which the following are included.
(i)
Spider (ii) Cockroach (iii) Prawn (iv) Housefly
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2
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Ans
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Ans:
(a) The activities of life are performed by a single cell in primitive
organisms while
there are different organs for performing various functions in advanced organisms.
(b)
(i) Spider – Arachnida
(ii) Cockroach – Dictyoptera (iii) Prawn – Arthropoda (iv) Housefly – Arthropoda |
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7
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Enlist
any two characteristics which are present in animals which belong to phylum
chordata.
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2
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Ans
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All chordates possess the following features:
(i) have a notochord
(ii) have a dorsal nerve cord (iii) are triploblastic (iv) have paired gill pouches |
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8
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Write three distinguish feature of phylum
Echinodarmata. Give one example.
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3
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Ans
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Three distinguish feature of phylum
Echinodarmata :
(i) Free-living marine animals (ii) triploblastic
(ii) have a coelomic cavity
Examples are starfish and sea urchins
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9
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Explain,
What are organ specific manifestation and tissue specific manifestations?
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3
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Ans:
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When
a microbe infects the specific organ of an individual in a particular type of
disease,
it is termed as organ specific manifestation. For example, in tuberculosis the microbe infects the specific organ i.e. lungs of an individual. When a microbe infects the tissues of the body of an individual in a particular type of disease, it is termed as tissue specific manifestation. For example, in HIV the virus infects the tissue and cells of the organism making decreasing his/her immunity. |
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10
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What are the advantage of classifying organism? (3 point)
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3
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Ans:
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1. Classification helps in identify the living organisms
easily.
2. It makes study of such a wide variety of bio-life in
systematic manner.
3. Enables us understand how complex organisms evolve over
the time.
4. Classification help us understand the
inter-relationships among different groups.
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11
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Write one point difference between each , between the
following
(a) Annelids and arthropods (b) Thallophytes and petridophytes
(c) periferan and Coelenterates
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3
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Ans
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(a) Annelids have closed
circulatory systems in which the heart pumps blood into vessels
where as Arthropods, however, have open circulatory systems, so the blood actually pumps the blood into parts of the body cavity known as sinuses
(b) Thallophytes do not have well-differentiated body
design and petridophytes easily
differentiated into roots, stem and leaves (c) Porifera have very minimal body design differentiation whre as Coelenterates show more body design differentiation. |
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12
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write the apropriate term for
(a)Animals that are able to
maintain a certain body temp over a wide range of temp in the
environment
(b) Plants bear naked seeds (c) Plants which have Pseudocoelom
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3
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Ans
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(a) warm blooded animals- mammals and aves (b) Gymnosperms (c) Nematode
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13
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Write one point difference between each , between the
following
(a) Amphibian and Reptiles (b)
Aves and mamals (c) Gymnosperm and
angioosperm
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3
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Ans:
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(a)
Reptiles lay eggs with tough coverings and do
not need to lay their eggs in water,
unlike amphibians. (b) Aves are warm-blooded animals and have a four-chambered heart. They lay eggs.
Whereas mamals are warm-blooded animals and have a four-chambered
heart. They
have mammary gland and give birth to child.
(c) Gymnosperm bear naked seeds where as angioosperm bear
seeds inside fruit
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14
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Why
is there a need for systematic naming of living organisms?
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3
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Ans
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The
scientific name for an organism is essential to identify living organisms
anywhere
in the world. |
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15
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Write three convention that are followed while writing scientific
names of the species
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3
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Ans
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The system of scientific naming or nomenclature we use
today was introduced by
Carolus Linnaeus
Certain conventions are followed while writing the
scientific names:
1. The name of the genus begins with a capital letter.
2. The name of the species begins with a small letter.
3. When printed, the scientific name is given in italics.
4. When written by hand, the genus name and the species
name have to be
underlined separately FOR MORE SOLVED PAPER CLICK HERE |
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