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31 Years NEET Previous Year Questions: Animal Kingdom - 1


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15 Questions MCQ Test Biology Class 11 | 31 Years NEET Previous Year Questions: Animal Kingdom - 1

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31 Years NEET Previous Year Questions: Animal Kingdom - 1 - Question 1

Read the following statements.    (NEET 2021)

(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.

Detailed Solution for 31 Years NEET Previous Year Questions: Animal Kingdom - 1 - Question 1
  • Those cnidarians which exist in both forms exhibit alternation of generation (Metagenesis), i.e., polyps produce medusae asexually and medusae form the polyps sexually (e.g., Obelia). Metagenesis is not observed in Helminths.
    Hence, statement a is incorrect.
  • Comb Plates: Comb plates are a characteristic feature of ctenophores. They help in locomotion.
    Hence, statement d is incorrect.
  • Roundworms: Roundworms belong to Phylum Aschelminthes and have organ-system level of body organisation.
    Hence, statement c is correct.
  • Echinoderms: The echinoderms have three primary germ layers during development and hence are triploblastic. Echinoderms are coelomates as the cavity between the body wall and alimentary canal is lined by mesoderm. The most distinctive feature of echinoderms is the presence of water vascular system which helps in locomotion, capture and transport of food and respiration.
    Hence, statements b and e are correct.

Hence, The correct option is B 

NCERT Reference: Refer topics “4.2.2 Phylum – Coelenterata (Cnidaria)”, “4.2.3 Phylum – Ctenophora”, “4.2.5 Phylum – Aschelminthes” and “4.2.9 Phylum – Echinodermata”

31 Years NEET Previous Year Questions: Animal Kingdom - 1 - Question 2

Bilaterally symmetrical and acoelomate animals are exemplified by :   [NEET 2020]

Detailed Solution for 31 Years NEET Previous Year Questions: Animal Kingdom - 1 - Question 2

The correct option is D: Platyhelminthes

  • Flatworms are bilaterally symmetrical, triploblastic, and acoelomate animals with organ level of organisation.
  • Aschelminthes is triploblastic, bilaterally symmetrical and pseudocoelomate.
  • Annelida is triploblastic, bilaterally symmetrical and acoelomate.
  • Ctenophora is radially symmetrical, diploblastic.


Hence, the correct option is D.
NCERT Reference: Page no. 51 of topic “4.2.4 Phylum – Platyhelminthes” of chapter 4.

31 Years NEET Previous Year Questions: Animal Kingdom - 1 - Question 3

Consider the following features.    [NEET 2019]

(A) Organ system level of organisation
(B) Bilateral symmetry
(C) True coelomates with segmentation of body

Select the correct option of animal groups which possess all the above characteristics.

Detailed Solution for 31 Years NEET Previous Year Questions: Animal Kingdom - 1 - Question 3
  • True segmentation is present in Annelida, Arthropoda and Chordata.
  • They also have an organ-system level of organisation, bilateral symmetry and are true coelomates.
  • On the other hand, molluscs have an unsegmented body.

Hence, the correct option is B.
NCERT Reference: Refer topics “4.2.6 Phylum – Annelida”, “4.2.7 Phylum – Arthropoda” and “4.2.11 Phylum – Chordata” of chapter 4.

31 Years NEET Previous Year Questions: Animal Kingdom - 1 - Question 4

Which of the following animals does not undergo metamorphosis?    [NEET 2018]

Detailed Solution for 31 Years NEET Previous Year Questions: Animal Kingdom - 1 - Question 4
  • Metamorphosis is the process of transformation of an immature larva into an adult form in two or more distinct stages.
  • Animals that undergo metamorphosis are said to have indirect development, e.g., tunicates, moths, starfish, etc.
  • In the case of earthworms, development is direct which means no larval stage is present and hence, there is no metamorphosis.

Hence, the correct option is A.
NCERT Reference: Page no. 56 of topic “4.2.11.1 Class – Cyclostomata” of chapter 4.

31 Years NEET Previous Year Questions: Animal Kingdom - 1 - Question 5

Which one of the following characteristics is not shared by birds and mammals ?           [2016]

Detailed Solution for 31 Years NEET Previous Year Questions: Animal Kingdom - 1 - Question 5
  • Giving birth to living young that develop within the mother's body rather than hatching from eggs is called viviparity.
  • All mammals except the monotremes are viviparous. Birds are oviparous and mammals are viviparous.

Hence, the correct option is C.

Similarities between Aves and Mammals are:

  • Warm-blooded nature: Both are homeothermic (warm-blooded) animals they are able to maintain a constant body temperature.
  • Both respire through the lungs.
  • Ossified endoskeleton: An endoskeleton made of bones is known as an ossified endoskeleton. Most organisms like bony fishes, mammals, birds, and reptiles have an endoskeleton made purely out of bones and cartilage. In Aves endoskeleton is fully ossified (bony) and long bones are hollow with air cavities.
  • Four-Chambered Heart: Both have a four-chambered heart.
  • Fertilization: In both sexes are separate and fertilization is internal.

NCERT Reference: Refer topic “4.2.11.6 Class – Aves” and “4.2.11.7 Class – Mammalia” of chapter 4.

31 Years NEET Previous Year Questions: Animal Kingdom - 1 - Question 6

Which of the following characteristic feature always holds true for the corresponding group of animals?             [2016]

Detailed Solution for 31 Years NEET Previous Year Questions: Animal Kingdom - 1 - Question 6
  • Chondrichthyes always have a cartilaginous endoskeleton. Chondrichthyes is a class that contains the cartilaginous fishes: they are jawed vertebrates with paired fins, paired nares, scales, a heart with its chambers in series, and skeletons made of cartilage rather than bone.
  • Most mammals are viviparous, giving birth to live young. However, the five species of monotreme, the platypuses and the echidnas lay eggs.
  • Chordates have jawless animals (Agnatha) as well.
  • Most reptiles have 3 chambered heart. Crocodilians have 4 chambered hearts. Turtles have 3 chambered heart but with an incomplete wall in the single ventricle, so their hearts are functionally 4 chambered.

Hence, the correct option is A
NCERT Reference: Page no. 56 of topic “4.2.11.2 Class – Chondrichthyes” of chapter 4.

31 Years NEET Previous Year Questions: Animal Kingdom - 1 - Question 7

Body having meshwork of cell, internal cavities lined with food filtering flagellated cells and indirect development are the characteristics of phylum ______.               [2015 RS]

Detailed Solution for 31 Years NEET Previous Year Questions: Animal Kingdom - 1 - Question 7

The correct option is A.

Explanation of correct option:

  1. The phylum Porifera includes multicellular animals that are commonly called sponges. They exhibit the cellular level of organization; their body is a meshwork of cells.
  2. Sponges possess a water transport system (canal) and an internal cavity (spongocoel).
  3. The canal and spongocoel are lined by choanocytes (collar cells). Choanocytes are flagellated cells that help to filter water and food.
  4. Sponges undergo indirect development. It is characterized by the presence of a larval stage which is morphologically different from the adult.

Explanation of incorrect option:

Option B:

  1. The phylum Mollusca comprises bilaterally symmetrical and coelomate animals. Example: squid.
  2. They are triploblastic and the level of organization is organ-system.

Option C:

  1. Protozoans are eukaryotic, unicellular, and heterotrophs. Example: Amoeba.
  2. They reproduce both sexually and asexually.

Option D:

  1. The phylum Coelenterata (Cnidaria) includes aquatic animals that possess specialized cells called cnidoblasts. Example: corals.
  2. They are diploblastic animals and exhibit tissue level of organization.

Final answer: Body having meshwork of cells, internal cavities lined with food filtering flagellated cells, and indirect development are the characteristics of phylum Porifera.

Hence, the correct option is A
NCERT Reference: Pge no. 49 of topic “4.2.1 Phylum – Porifera” of chapter 4.

31 Years NEET Previous Year Questions: Animal Kingdom - 1 - Question 8

A jawless fish, which lays eggs in fresh water and whose ammocoetes larvae after metamorphosis return to the ocean is:   [2015 RS]

Detailed Solution for 31 Years NEET Previous Year Questions: Animal Kingdom - 1 - Question 8

The correct option is C

Explanation of correct option

  1. Petromyzon marinus or sea lamprey is a jawless marine migratory fish that spends most of its adult life in the sea.
  2. Matured fish migrate from marine to freshwater and lay eggs in areas with high oxygen levels.
  3. These ammocoetes hatch and, before metamorphosis, migrate to the sea.

Explanation of incorrect option

Option A: 
Myxine glutinosa or Atlantic hagfish are non-migratory marine organisms without copulatory organs.

Option B:
Neomyxine biniplicata or hagfishes are non-migratory marine organisms without copulatory organs.

Option D:
Eptatretus stoutii or Pacific hagfish are non-migratory marine organisms without copulatory organs.

Final answer: A jawless fish that lays eggs in freshwater and whose ammocoetes larvae after metamorphosis return to the ocean is Petromyzon.

Lamprey - Wikipedia
NCERT Reference: Page no. 56 of topic “4.2.11.1 Class – Cyclostomata” of chapter 4.

31 Years NEET Previous Year Questions: Animal Kingdom - 1 - Question 9

Which of the following animals is not viviparous?                [2015 RS]

Detailed Solution for 31 Years NEET Previous Year Questions: Animal Kingdom - 1 - Question 9
  • Animals that give birth to offspring are called viviparous.
  • Platypus is an oviparous animal (egg-laying). It belongs to the class- Mammalia. The platypus (Ornithorhynchus anatinus), also known as the duck-billed platypus, is a semiaquatic egg-laying monotreme.
  • Elephant, Whale and Flying fox are viviparous animals. All mammals are viviparous except monotremes. It is the only mammals that lay eggs instead of giving birth to live young.

Hence, the correct option is B.
NCERT Reference: Page no. 60 of topic “4.2.11.7 Class – Mammalia” of chapter 4.

31 Years NEET Previous Year Questions: Animal Kingdom - 1 - Question 10

Select the Taxon mentioned that represents both marine and freshwater species:        [2014]

Detailed Solution for 31 Years NEET Previous Year Questions: Animal Kingdom - 1 - Question 10
  • Cnidarians are aquatic, mostly marine, solitary or colonial sessile or free-swimming radially symmetry animals while members of Ctenophora, Cephalochordata, Echinodermata are found exclusively in the marine environment.

So the correct answer is 'Cnidaria'.

Hence, the correct option is D.
NCERT Reference: Page no. 50 of topic “4.2.2 Phylum – Coelenterata (Cnidaria)” of chapter 4,

Cnidaria

31 Years NEET Previous Year Questions: Animal Kingdom - 1 - Question 11

Which one of the following living organisms completely lacks a cell wall?     [2014]

Detailed Solution for 31 Years NEET Previous Year Questions: Animal Kingdom - 1 - Question 11
  • Gorgonia belongs to cnidaria class- Anthozoa (animal).
  • Gorgonians are also known as sea whips or sea fans and are similar to the sea pen, a soft coral.
  • These marine invertebrates are multi-cellular, have no cell walls (a characteristic of plants), most have tissues (organized groups of cells), and all are heterotrophic, i.e., they cannot manufacture their own food and depend on other organisms for nutrition.

Hence, the correct option is B.
NCERT Reference: Page no. 50 of topic “4.2.2 Phylum – Coelenterata (Cnidaria)” of chapter 4.

31 Years NEET Previous Year Questions: Animal Kingdom - 1 - Question 12

Planaria possesses high capacity of:                 [2014]

Detailed Solution for 31 Years NEET Previous Year Questions: Animal Kingdom - 1 - Question 12
  • Planaria is a flatworm that possesses a high power of regeneration due to the neoplastic cells which are found in them.
  • If an individual is cut transversely into two parts, the anterior segment will generate a new tail and the posterior end will develop a new head.

Explain the process of regeneration in Planaria. How is this process  different from reproduction?
Hence, the correct option is B.
NCERT Reference: Page no. 51 of topic “4.2.4 Phylum – Platyhelminthes” of chapter 4.

31 Years NEET Previous Year Questions: Animal Kingdom - 1 - Question 13

A marine cartilaginous fish that can produce electric current is:      [2014]

Detailed Solution for 31 Years NEET Previous Year Questions: Animal Kingdom - 1 - Question 13
  • Torpedo is electric ray. Torpedo is a sluggish fish. It is carnivorous. The prey is firstly killed by electric shock. The shock can also be harmful to human beings.
  • Pristis is a sawfish.
  • Trygon is sting ray
  • Scoliodon is a dog fish.


Hence, the correct option is B.

NCERT Reference: Page no. 57 of topic “4.2.11.2 Class – Chondrichthyes” of chapter 4.

31 Years NEET Previous Year Questions: Animal Kingdom - 1 - Question 14

Which of the following represents the correct combination without any exception?

Detailed Solution for 31 Years NEET Previous Year Questions: Animal Kingdom - 1 - Question 14
  • Cyclostomata have sucking and circular mouth without jaws. Median fins (appendages) are present but paired fins (appendages) are absent. Integuments are without scales.
  •  In aves, forelimbs are modified into wings for flying and hind limbs are used for walking and running. The body is covered with feathers. Skin is thin, dry and non-glandular. Lungs have air sacs. 
  • In mammals, mammary glands are present for the nourishment of the young ones. Hairs are present on the body. They have 2 pairs of limbs. Pinnae are absent in monotreme (mammals that lay eggs). 
  • Chondrichthyes have a persistent notochord, placoid scales as the exoskeleton and ventrally positioned mouth. Gill slits are not covered by an operculum. 

Hence, the correct option is A.
NCERT Reference: Page no. 56 of topic “4.2.11.2 Class – Chondrichthyes” of chapter 4.

31 Years NEET Previous Year Questions: Animal Kingdom - 1 - Question 15

Which of the following features is not present in the phylum - Arthropoda?        

Detailed Solution for 31 Years NEET Previous Year Questions: Animal Kingdom - 1 - Question 15
  • Parapodia are present in aquatic annelids like Nereis, which help them in swimming.
  • The other three features, i.e. metameric segmentation, jointed appendages and chitinous exoskeleton are present in phylum-Arthropoda. 

Hence, the correct option is C
NCERT Reference: Page no. 52 of topic “4.2.6 Phylum – Annelida” of chapter 4.

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