Match The Columns
- Match Column I with Column II.
Column I Column II
A. Choanocytes (i) Platyhelminthes
B. Cnidoblasts (ii) Ctenophora
C. Flame cells (iii) Porifera
D. Nephridia (iv) Coelenterata
E. Comb plates (v) Annelida
- Match Column I with Column II. (There can be more than
one match for items in column I).
Column I Column II
A. Mouth circular (i) Petromyzon
and jawless
B. Placoid scales (ii) Scoliodon
C. Uropygial glands (iii) Struthio
D. Marsupial pouch (iv) Didelphis
E. Presence of pinna (v) Chimaera
(vi) Myxine
(vii) Columba
(viii) Rattus
(ix) Macropus
(x) Cavia
Passage Based Questions
18.(A) Complete the given passage with appropriate words or
phrases.
The animals which posses true coelom are called (i). The
true coelom is a body cavity which arises as a cavity in (ii).
The (ii) provides a cellular lining called (iii) to the cavity. The
coelom is filled with (iv) secreted by the (iii). True coelom is
found in (v) , (vi) and (vii). True coelom is of two types,
(viii) and (ix). The animals which do not have coelom are
called (x).
(B) Amphibians are warm blooded animals. Their skull is
monocondylic and the heart is two chambered. Kidneys are
metanephric and urinary bladder is absent in frog. Their
larval forms are ureotelic whereas adults are ammonotelic.
Twelve pairs of cranial nerves are present in them
Fertilisation is internal and they are mostly viviparous.
Assertion & Reason
In each of the following questions, a statement of Assertion (A)
is given and a corresponding statement of Reason (R) is given
just below it. Of the statements, mark the correct answer as :
(a) if both A and R are true and R is the correct explanation of A
(b) if both A and R are true but R is not the correct explanation of A
(c) if A is true but R is false
(d) if both A and R are false.
- Assertion : Gills of chordates differ from the gills of non-
chordates.
Reason : Gills of chordates occur in pharyngeal gill slits
which are absent in non-chordates.
- Assertion : Fishes have venous heart.
Reason : Only veins are present in the circulatory system
of fishes.
- Assertion : Metamerism is the characteristic feature of
annelida.
Reason : Annelids are diploblastic, segmented and
coelomate animals.
- Assertion : Platyhelminthes and molluscs are diploblastic
animals.
Reason : In diploblastic animals, an undifferentiated
layer called mesoderm is present between the ectoderm
and endoderm.
- Assertion : Presence of water vascular system is the
characteristic feature of Phylum Echinodermata.
Reason : A perforated plate called madreporite is present
in water vascular system which helps in locomotion.
- Assertion : Direct development is present in Hydra.
Reason : In direct development, the young ones do not
resemble the adults.
- Assertion : Aschelminthes are called as pseudocoelomates.
Reason : In aschelminthes, mesoderm is present as
scattered pouches in between ectoderm and endoderm.
- Assertion : In ctenophores, locomotion takes place
through comb plates.
Reason : Comb plates are comb-like ciliary plates present
on the body of ctenophores.
- Assertion : Phylum Arthropoda is the largest phylum of
Kingdom Animalia.
Reason : Arthropods possess thick chitinous exoskeleton
and jointed appendages.
- Assertion : Taenia solium does not have an alimentary
canal.
Reason : Adults of T. solium live as parasites in the small
intestine of human beings.
Figure Based Questions
- Examine the given figure and answer the questions regarding it.
(a) What features
do you find
peculiar about
urinogenital
system of the
given bird?
(b) Give valid
explanation
for such unique characteristics of birds.
(c) Where does fertilisation takes place in birds?
(d) What would happen if in a bird shell gland is
dysfunctional?