Chapter Exam

Chapter 4: Animal Kingdom — Online MCQ Test

Q: Which of the following is a characteristic feature of animals belonging to Phylum Porifera?

Answer: B. Porous body with canal system — Poriferans are sponges and have a body full of pores through which water enters and circulates. This canal system is their defining feature.

Q: Animals with radial symmetry are typically found in which phylum?

Answer: C. Cnidaria — Cnidarians such as Hydra and jellyfish commonly show radial symmetry. This means the body parts are arranged around a central axis.

Q: Which of the following animals is a coelomate?

Answer: B. Earthworm — Earthworm belongs to Annelida and has a true coelom. A coelom is a body cavity lined by mesoderm.

Q: Which phylum includes animals with a notochord at least in some stage of life?

Answer: C. Chordata — Chordates are defined by the presence of a notochord at some stage of their development. In vertebrates, it is replaced by the vertebral column.

Q: Animals that possess a pseudocoelom belong to which phylum?

Answer: B. Nematoda — Nematodes or roundworms possess a pseudocoelom, a body cavity not completely lined by mesoderm. This is a major diagnostic feature of the phylum.

Q: Which of the following is correctly matched?

Answer: B. Ascaris — Nematoda — Ascaris is a roundworm and belongs to Phylum Nematoda. Hydra belongs to Cnidaria, Pila to Mollusca, and Sycon to Porifera.

Q: Which of the following animals is most correctly placed in the category 'invertebrate with internal fertilization and direct development' according to standard NCERT examples?

Answer: A. Earthworm — Earthworm is an annelid invertebrate and shows internal fertilization with direct development. The other organisms do not fit this combination.

BIOLOGY · Grade 11 · CBSE(NCERT)

Practice Chapter 4: Animal Kingdom with a free chapter-wise online MCQ test for CBSE(NCERT) Grade 11 BIOLOGY. This chapter covers: Animal Classification Non Chordates Chordates Phyla Symmetry Coelom Segmentation Vertebrates Invertebrates. AI-generated questions from basic to board-exam level, with instant results and explanations.

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Chapter 4: Animal Kingdom — Important Questions & Answers (FAQ)

Frequently asked questions from CBSE(NCERT) Grade 11 BIOLOGY — Chapter 4: Animal Kingdom, with answers and explanations. These are sample questions; the exam has its own separate question set.

Which of the following is a characteristic feature of animals belonging to Phylum Porifera?

A. Presence of stinging cells
B. Porous body with canal system ✓
C. Segmented body with jointed appendages
D. Notochord throughout life

Answer: B. Porous body with canal system
Poriferans are sponges and have a body full of pores through which water enters and circulates. This canal system is their defining feature.

Animals with radial symmetry are typically found in which phylum?

A. Annelida
B. Arthropoda
C. Cnidaria ✓
D. Mollusca

Answer: C. Cnidaria
Cnidarians such as Hydra and jellyfish commonly show radial symmetry. This means the body parts are arranged around a central axis.

Which of the following animals is a coelomate?

A. Planaria
B. Earthworm ✓
C. Roundworm
D. Tapeworm

Answer: B. Earthworm
Earthworm belongs to Annelida and has a true coelom. A coelom is a body cavity lined by mesoderm.

Which phylum includes animals with a notochord at least in some stage of life?

A. Arthropoda
B. Mollusca
C. Chordata ✓
D. Echinodermata

Answer: C. Chordata
Chordates are defined by the presence of a notochord at some stage of their development. In vertebrates, it is replaced by the vertebral column.

Animals that possess a pseudocoelom belong to which phylum?

A. Annelida
B. Nematoda ✓
C. Arthropoda
D. Chordata

Answer: B. Nematoda
Nematodes or roundworms possess a pseudocoelom, a body cavity not completely lined by mesoderm. This is a major diagnostic feature of the phylum.

Which of the following is correctly matched?

A. Hydra — Porifera
B. Ascaris — Nematoda ✓
C. Pila — Annelida
D. Sycon — Coelenterata

Answer: B. Ascaris — Nematoda
Ascaris is a roundworm and belongs to Phylum Nematoda. Hydra belongs to Cnidaria, Pila to Mollusca, and Sycon to Porifera.

Which of the following is a correct comparison between annelids and nematodes?

A. Both have true coelom
B. Annelids are pseudocoelomate and nematodes are coelomate
C. Annelids are coelomate and nematodes are pseudocoelomate ✓
D. Both are acoelomate

Answer: C. Annelids are coelomate and nematodes are pseudocoelomate
Annelids possess a true coelom, while nematodes have a pseudocoelom. This is a standard distinction used in classification.

Which of the following sets is arranged in the correct order from simpler to more complex body organization as given in NCERT?

A. Porifera → Cnidaria → Platyhelminthes → Annelida ✓
B. Cnidaria → Porifera → Annelida → Arthropoda
C. Arthropoda → Mollusca → Porifera → Platyhelminthes
D. Annelida → Porifera → Cnidaria → Chordata

Answer: A. Porifera → Cnidaria → Platyhelminthes → Annelida
NCERT classification broadly progresses from simpler body organization in Porifera to more complex groups such as Annelida and beyond. The other sequences are not logical in this context.

Which statement is the most appropriate distinction between chordates and non-chordates?

A. All chordates are aquatic and all non-chordates are terrestrial
B. Chordates have a notochord at some stage; non-chordates do not ✓
C. Non-chordates lack symmetry, while chordates always show radial symmetry
D. Chordates are all vertebrates, and non-chordates are all invertebrates without exception

Answer: B. Chordates have a notochord at some stage; non-chordates do not
The presence of a notochord at some stage is the key feature of chordates. Non-chordates do not possess a notochord.

Which of the following animals is most correctly placed in the category 'invertebrate with internal fertilization and direct development' according to standard NCERT examples?

A. Earthworm ✓
B. Hydra
C. Starfish
D. Sycon

Answer: A. Earthworm
Earthworm is an annelid invertebrate and shows internal fertilization with direct development. The other organisms do not fit this combination.

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