BIOLOGY M.C.Q (1 Marks)

$A$. Pharynx is perforated by gill slits.

$B$. Notochord is absent.

$C$. Central nervous system is dorsal.

$D$. Heart is dorsal if present.

$E$. Post anal tail is absent.

Choose the most appropriate answer from the options given below:

Choose the correct answer from the options given below :

Choose the correct answer from the options given below :

$A$. Presence of a mid-dorsal, solid and double nerve cord.

$B$. Presence of closed circulatory system.

$C$. Presence of paired pharyngeal gill slits.

$D$. Presence of dorsal heart

$E$. Triploblastic pseudocoelomate animals.

Choose the correct answer from the options given below:

Assertion $(A)$:All vertebrates are chordates but all chordates are not vertebrates.

Reason $(R)$:Notochord is replaced by vertebral column in the adult vertebrates.

In the light of the above statements, choose the most appropriate answer from the options given below:

Choose the correct answer from the options given below.

$(a) -(b) -(c) -(d)$

$(a)$ Metagenesis is observed in Helminths.

$(b)$ Echinoderms are triploblastic and coelomate animals.

$(c)$ Round worms have organ-system level of body organization.

$(d)$ Comb plates present in ctenophores help in digestion.

$(e)$ Water vascular system is characteristic of Echinoderms.

Choose the correct answer from the options given below.

Column $-I$                                             Column $-II$

$(a)$ $6-15$ pairs of gill slits                   $(i)$ Trygon

$(b)$ Heterocercal caudal fin                   $(ii)$ Cyclostomes

$(c)$ Air Bladder                                      $(iii)$ Chondrichthyes

$(d)$ Poison sting                                    $(iv)$ Osteichthyes

Select the correct option

Select the correct option from the following

$(a) \quad (b)\quad (c)\quad (d)$

$R$ : It allowed the animal to have an alimentary canal longer than the body & space for storing gametes.

$R$ : All the three phyla include members with bilateral symmetry and true coelom.

$I.$ Diploblastic

$II.$ Acoelomate

$III.$ Radial symmetry

 $\begin{array}{|l|l|} \hline Column\,\,I & Column\,\,II \\ \hline A.\,\,Physallia & 1.\,\,Liver\,\,fluke \\ \hline B.\,\,Taenia & 2.\,\,Sycon  \\ \hline C.\,\,Fasciola & 3.\,\,Tape\,\,worm \\ \hline D.\,\,Scypha & 4.\,\,Portugese\,\,man\,\,of\,\,war \\ \hline \end{array}$

$A\ \ B\ \ C\ \ D$

$I$. Chordata                 $II$. Annelida

$III$. Arthropoda        $IV$. Platyhelminthes

$V$. Ctenophora           $VI$. Aschelminthes

(column-$I$) with one characteristic

(column $II$), and the phylum/class

(column $III$) to which it belongs

Column $I$ - Column $II$ - Column $III$

 $\begin{array}{|l|l|} \hline Column\,\,-\,\,I & Column\,\,-\,\,II \\ \hline (a)\,\,Trygon & (i)\,\,Echinodermata \\ \hline (b)\,\,Ascidia & (ii)\,\,Viviparous \\ \hline (c)\,\,Asterias & (iii)\,\,Chondrichthyes \\ \hline (d)\,\,Kangaroo & (iv)\,\,Oviparous \\ \hline (e)\,\,Penguin & (v)\,\,Urochordata \\ \hline \end{array}$

 $\begin{array}{|l|l|} \hline Column-I  & Column-II \\ \hline 1.\,\,Osculum & p.\,\,Fasciola \\ \hline 2.\,\,Hypostom  & q.\,\,Ctenoplana \\ \hline 3.\,\,Comb\,\,jellies & r.\,\,Spongilla \\ \hline 4.\,\,Hook\,\,and\,\,sucker & s.\,\,Meandrina \\ \hline \end{array}$

Match items in column I with those give in column II

Column $-I$                                                 Column $-II$

(Animals with common name)                 Animals with zoological name)

$A $        Starfish                                          $p$     Sepia

$B$        Jellyfish                                          $q  $   Astropecten

$C   $     Devilfish                                          $r  $   Aurelia

$D $       Cuttlefish                                       $ s $    Octopus

$(A)$ Ascidia            $(B)$ Cockroach

$(C)$ Earthworm      $(D)$ Prawn

$(E)$ Sliverfish          $(F)$ Snail

$(G)$ Squid

$R$ : Bats and whales show echolocation and four chambered heart.

$R$ : Air sacs supplement respiration.

$b$. Seahorse

$c$. Flying fish

$d$. Sawfish

$e$. Dogfish

 $\begin{array}{|l|l|} \hline Column\,\,-\,\,I & Column\,\,-\,\,II  \\ \hline (1)\,\,Scolidon & (p)\,\,Saw\,\,fish \\ \hline (2)\,\,Pristis & (q)\,\,Sting\,\,fish  \\ \hline (3)\,\,Carcharodon & (r)\,\,Dog\,\,fish \\ \hline (4)\,\,Trygon & (s)\,\,Great\,\,white\,\,shark \\ \hline \end{array}$