Biology: Animal Kingdom (Solved Examples Part 1)

Struggling with the diverse and fascinating world of the Animal Kingdom? Our blog presents 20-25 solved examples that cover essential topics like classification, characteristics of phyla, and key differences between vertebrates and invertebrates. Tailored for NEET, CBSE, and other competitive exams, these examples simplify complex concepts and make learning engaging. Whether it's understanding the taxonomy hierarchy or unique features of chordates, our step-by-step solutions will strengthen your knowledge and improve exam readiness. Explore these solved examples and master the Animal Kingdom effortlessly!

1. Which one of the following statement is correct?

A . All mammals are oviparous

B . All mammals are omnivorous

C . All mammals possess dorsal tubular nerve cord

D . All mammals possess ventral nerve cord

Solution:

All mammals possess dorsal tubular nerve cord.

Correct Answer : C

2. Name reptilia signifies that these animals are:

A . able to climb, swim and run

B . able to crowl on the ground and in water

C . able to dig burrows

D . creeping vertebrates

Solution:

Reptiles are called so because of their creeping nature of movement on land

Correct Answer : D

3. Select the correct option where the set of animals which belong to same taxon.

A . Silver fish, dog fish, cuttlefish

B . Hook worm, round worm, tongue worm

C . Dolphin, whale, flying fox

D . Sea pen, sea lily, sea urchin

Solution:

Dolphins, whale and flying fox are mammals. rest groups are from different phyla.

Correct Answer : C

4. In Echinoderms, respiration occurs through

A . Respiratory trees

B . Tube feet

C . Dermal papulae

D . All

Solution:

All mentioned options are respiratory organs of different echinoderms

Correct Answer : D

5. All mammals are characterized by:

A . Presence of hairs in their skin

B . Homeothermy and presence of pinna

C . Presence of mammary glands

D . Viviparity

Solution:

Presence of mammary gland is an exclusive feature of mammals

Correct Answer : C

6. Among the following edible fishes, which one is a marine fish having rich source of omega-3 fatty acids?

A . Mackerel

B . Mystus

C . Mangur

D . Mrigala

Solution:

Mackerel are marine edible fishes having abundant amount of omega-3-fatty acids. This play an important role in rejuvenation process and have cardio protective role. E.g. Decosahexaenoic acid (DHA)

Correct Answer : A

7. Find out the group of animals which are homeothermals:

A . Corvus, Columba, Aptenodytes

B . Psittacula, Crocodile, Chelone

C . Struthio, Columba, Chameleon

D . Pavo, Columba, Calotes

Solution:

The group of birds mentioned in option (1) is of homeothermal category

Correct Answer : A

8. The movement or locomotion in Aschelminthes is due to

A . Calcareous skeleton

B . Siliceous Skeleton

C . Hydro skeleton

D . Exoskeleton

Solution:

Members of phylum aschelminthes do move with help of pseudocoelomic fluid in body cavity. They use body wall muscles to push their body in the surrounding medium

Correct Answer : C

9. Which of the following groups of animals maintain high and constant body temperature such as mammals?

A . Reptiles

B . Amphibians

C . Birds

D . Fishes

Solution:

Birds are endothermals (homeothermals) means they can maintain constant body temperature by the metabolic activity taking place in their bodies.

Correct Answer : C

10. Find the odd one among the following w.r.t. dioecious organisms.

A . Ascaris

B . Anopheles

C . Ctenoplana

D . Nereis

Solution:

Ctenoplana is a ctenophore where both male and female gametes are produced by the same animal, rest options are dioecious i.e., male and female gametes are produced by different sexes.

Correct Answer : C

11. Mark what is incorrect regarding to the phylum-arthropoda

A . Open type of circulatory system

B . Bilaterally symmetrical, coelomate animals

C . Diploblastic with head, thorax and abdomen

D . Presence of Malpighian tubules and antennae

Solution:

Arthropodes are triploblastic.

Correct Answer : C

12. In some animal groups, the body is found divided into compartments with serial repetition of at least some organs. This characteristic feature is called

A . Segmentation

B . Metamerism

C . Metagenesis

D . Metamorphosis

Solution:

It is called metamerism.

Correct Answer : B

13. Crocodile and penguin are similar to Whale and Dogfish in which one of the following features?

A . Possess a solid single stranded central nervous systcm

B . Lay eggs and guard them till they hatch

C . Possess bony skeleton.

D . Have gill slits at some stage

Solution:

Crocodile a reptile, penguin a bird, whale a mammal and dogfish a fish. All are vertebrate and have pharyngeal gill slits at some stage of their life.

Correct Answer : D

14. Which of the following feature of phylum arthropoda is exclusive:

A . Double mid ventral nerve cord and jointed appendages

B . Compound eyes and uricotelism

C . Simple or compound eyes with malpighian tubules

D . Body covered by chitinous cuticle with open or closed circulatory system

Solution:

Arthropodes are with simple or compound eyes and malpighian tubules as excretory organ.

Correct Answer : C

15. In case of Poriferans, the spongocoel is lined with flagellated cells called:

A . Oscula

B . Choanocytes

C . Mesenchymal cells

D . Ostia

Solution:

The flagellated cells lining the spongocoel is called choanocytes cells. Ostia are the pores present on the body of sponges.

Correct Answer : B

16. Ctenophores are

A . Bilaterally symmetrical organisms

B . Lack ciliary plates

C . Provided with nematocysts

D . Exclusively marine

Solution:

Ctenophores are solitary free living marine animals

Correct Answer : D

17. Correct characteristic between devil fish and tongue worm is

A . Presence of heamocoel

B . Unsegmented body

C . Direct development

D . Presence of parapodia as respiratory structure

Solution:

Devil fish (octopus) and tongue worm (Balanoglossus) both have unsegmented body.

Correct Answer : B

18. Which of the following group of animals shows closed circulatory system, setae for locomotion and double ventral nerve cord

A . Nereis, Pheretima, Hirudinaria

B . Ascaris, Lumbricus, Octopus

C . Scorpion, Nereis, Hirudinaria

D . Pheretima, Pila, Loligo

Solution:

Annelids shows all the mentioned feature in the statement

Correct Answer : A

19. Which one of the following is applicable to some Protozoans?

A . Physiological division of labour

B . Alternation of generation

C . Radial symmetry

D . Larval forms

Solution:

Some of protozoans show altemation of generations means one generation reproduces by spores and another generation by gamete formation

Correct Answer : B

20. Body having meshwork of cells, internal cavities lined with food filtering flagellated cells and indirect development is the characteristics of phylum:

A . Protozoa

B . Coelenterata

C . Porifera

D . Mollusca

Solution:

Poriferans shows all the mentioned features in the statement.

Correct Answer : C