Sunday, November 1, 2020

Animal Kingdom | Class 11 | Previous Years Questions and Answers (2015 to 2020): Part 1

ANIMAL KINGDOM: Part 1

MARCH 2017


1. Match the items in columns B & C with A. (Score 3)

A

B

C

Phylum/class

Common example

Unique feature

Pisces

Aedes

Presence of hair

Mammalia

Leech

Open circulatory system

Arthropoda

Felis

Presence of two chambered heart

 

Scoliodon

Presence of Nephridia


✔️Answer:


A

B

C

Phylum/class

Common example

Unique feature

Pisces

Scoliodon

Presence of two chambered heart

Mammalia

Felis

Presence of hair

Arthropoda

Aedes

Open circulatory system


OR 

Features of different phyla/ class are given below. Identify the phylum/class and give examples of each group. (Score 3)

a) Body is covered by scales, heart is three or four chambered. They respire through lungs.
b) They are exclusively marine, commonly called sea walnuts and shows bioluminescence.
c) Body is divided into proboscis, collar and trunk. They have open circulatory system and presence of proboscis gland. 

✔️Answer:

(a) Class Reptilia. E.g. Calotes, Crocodilus.
(b) Phylum Ctenophora. E.g. Pleurobrachia.
(c) Phylum Hemichordata. E.g. Balanoglossus.

2. Among the different phyla of animals ................... have pseudocoelom. (Score 1)

✔️Answer: Aschelminthes

3. Categorize the following animals under radial symmetry and bilateral symmetry. (Score 2)

Physalia, Tapeworm, Fasciola, Adamsia 

✔️Answer:

Radial symmetry: Physalia, Adamsia.
Bilateral symmetry: Tapeworm, Fasciola.

4. Prepare two matching pairs from the given list of animals and excretory organs. (Score 2)

Animals

Excretory organs

a. Prawn

i. Nephridia

b. Cockroach

ii. Antennal glands

c. Earthworm

iii. Flame cells

 

iv. Kidneys


✔️Answer:


Animals

Excretory organs

a. Prawn

ii. Antennal glands

c. Earthworm

i. Nephridia


2016 MARCH


1. The characteristic features of an invertebrate is given.

“The phylum includes the comb jellies, also called walnuts. They are noted for their bioluminescence and comb plates.” Identify the phylum. (Score 1)

✔️Answer: Ctenophora.

2. Fill in the blanks with appropriate word: (Score 1)

Osteichthyes: Cycloid scales
Chondrichthyes: ……………………

✔️Answer: Placoid scales.

3. Name the phyla in which the following cells/ structures/ organs are present. (Score 2)

a) Radula
b) Cnidoblast
c) Pneumatic bone
d) Proboscis gland

✔️Answer:

(a) Mollusca
(b) Cnidaria
(c) Chordata (Class Aves)
(d) Hemichordata

4. The following diagram shows the characteristic features of a phylum. (Score 2)

a) Identify the phylum.
b) Mention four salient features of this phylum.

✔️Answer:

(a) Chordata.
(b) Notochord present.
Dorsal nerve cord present.
Pharyngeal gill slits.
Post anal tail.


2015 SEPTEMBER (IMPROVEMENT)


1. Observe the following features of animals and answer the following questions. (Score 1)

· Moist skin
· Hooks and suckers
· Pneumatic bones
· Dry and non-glandular skin
· Metamerism

a. Select the flight adaptation of birds.
b. Select the amphibious adaptation of frog.

✔️Answer:

(a) Pneumatic bones, Dry and non-glandular skin.
(b) Moist skin.

2. Assign the following features of animals given in column A to the most appropriate animal phylum given in column B. (Score 2)

Column A

Column B

a)      Metamerism

i)          Ctenophora

b)      Spiny endoskeleton

ii)        Platyhelminthes

c)      Comb plates

iii)      Annelida

d)      Flame cells

iv)      Cnidaria

 

v)        Echinodermata

 

vi)      Porifera

 

vii)     Hemichordata


✔️Answer:


Column A

Column B

a)       Metamerism

Annelida

b)      Spiny endoskeleton

Echinodermata

c)       Comb plates

Ctenophora

d)      Flame cells

Platyhelminthes


3. The diagrammatic sketch given below represents a hypothetical chordate.


a. If you find any mistakes in the labelled parts, copy the diagram and make necessary corrections in the labelling.
b. Based on any two labelled parts in the diagram, mention how this phylum differs from non-chordates. (Score 3)

✔️Answer:

(a)


(b) Notochord present.
Pharyngeal gill slits.


2015 MARCH


1. Prawns and insects are included in phylum Arthropoda while they have different habits and habitats. Justify your answer. (Score 1)

✔️Answer:

Prawns and insects have jointed legs and chitinous cuticle.

2. Figures (X) & (Y) are the fish of two different classes. Identify them and differentiate between these classes. (Score 2)


✔️Answer:

X= Chondrichthyes. Cartilaginous endoskeleton, placoid scales etc.
Y= Osteichthyes. Bony endoskeleton, cycloid scales etc. 

3. Birds are well adapted for flying. Give any three of such adaptations. (Score 3)

✔️Answer:

> Presence of wings and beak.
> Pneumatic bones.
> Air sacs connected to lungs.

OR 

All vertebrates are chordates, but all chordates are not vertebrates. Justify this statement with an example.

✔️Answer:

Yes. All vertebrates have notochord which is replaced by vertebral column. But there are chordates other than vertebrates. E.g. Urochordates and Cephalochordates.

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