Thursday, 6 February 2014

TEXTBOOK ANSWERS AND SOLUTIONS Animal Kingdom CBSE-CLASS-XI-BIOLOGY




Q-1.     What are the difficulties that you would face in classification of animals if common fundamental features are not taken into account?

            i) The picture of animals at a glance will not be projected.

ii) The development of other animal species will not be made.

iii) The inter-relationship among animals will not to traceable.

Q-2)     If you are given a specimen, what are the ships that you would follow to classify it?

            1) Steps are :-             a) levels or gradation
                                    b) Patterns in organization.
                                    c) Symmetry
                                    iv) Diploblastic triploblastic
                                    v) Body cavity or Coolum
                                    vi) Segmentation

Q-3.     How useful in the study of the nature of body cavity & coelom in the classification of animals?

            The body cavity which is derived & bind by mesoderm is called coelom & the animals are called coelomatus eg= molecules

            ii) When there is the mesoderm is lived as poach like is called pseudocoelom & the animals called pseudocoelomatus e.g. = Aschihelmenthis

            iii) When there is absence of mesoderm, it is called acoelomates.
                                    E.g. = poriferas.

4) Distinguish between intracellular & intracellular digestion

Intra – cellular

i) Digestion takes place within the cell

ii) It is comparatively less efficient.

iii) few enzymes are associated with the digestion
e.g. = Amoeba
Extra – Cellular

I) Digestion takes place outside the cell & the alimentary canal
ii) this digestion is comparatively more efficient

iii) Large no of digestive glance & enzymes are associated with this digestion.
E.g. = Man.


b) Differentiate between direct & indirect development.

Direct

I) Here young ones resemble the adults in all respects

ii) Then is no intermediate stage

iii) e.g.  Hydro, man
Indirect

I) Here the young’s one do not recourses the adults.

2) The young ones usually pass through one or more intermediate stages before consisting the shape of doer.

E.g. = silk moth.


6) What are peculiar features that you find in parasitic platyhelmenthis?

            Thick tegument (60 dye covering)
            Adhesive organs like suckers & hook
            Mostly anaerobic respiration
            Cool of locomotors organs.

7) What are the reasons that you can think of for the arthropods to constitute the largest group of the animal kingdoms?

            Tough cuticle body
            Nervous systems are better developed.
            Sense organs are well developed.
            Joined appendages

8) Water vascular system is the characteristic of which group of the following
            a) Porifera b) tenophora
            c) Echinodermata d) chordate

            Ans. ©

9) All vertebrates’ are chordates but all chordates are not vertebrata”


10) How important is the presence of air bladder in fish?
            I) Air bladder regulates buoyancy to float in water.
ii) Animals of class chondricthyes do not have air bladder & in the absence of air bladder, the animals have to swim continuously to prevent sinking.

11) What are the modifications that are observed in bird mat keep them fly?

            Urinary bladder is absent
            Presence of one ovary.
            Hollow bones.
            Body is streamlined

12) Could the no of eggs or young ones produced by an oviparous & viviparous mother be equal?

            It is not possible as in oviparous animals; eggs are laid outside the body of female. Some egg may not get the favorable condition & hatching may degenerate. Go complete for such losses, many eggs are laid.

            In viviparous animals the development of embryo occurs inside the another

            only one or few young ones could be supported


13) Segmentation in the body is first observed in which of the following?

            a) Platy helminthes
            b) Asch helminthes
            c) annelid
            d) Arthropods           

            An – Annelids

14) Match the following

a) Operculum
b) parapoda
c) Scales
d) comes plates
e) Rodula
f) Hairs
g) Coenocytes
h) Gill slits
i) Ctenophores
ii) Mollusks
iii) Porifera
iv) Reptillia
v) Annelids
vi) Cyclostomes & Chondricthis
vii) Mammalian
viii) Ostichthyes.

An
a) = (viii
b) = (v)
c) = (iv)
d) = (i)
e) = (ii)
f)) = (viii)
g) = (iii)
h) = (vi)

Written By Badal Paul
The author is a passionate blogger, writer and educationalist. This blog is created to ease troubles of the Cbse students. The author holds multiple blogs and the writer of the Novel KALCHAKRA, OOM AND THE CHOSEN FIVE.