Chapter Exam

Unit 4: Animal Diversity - II — Online MCQ Test

Q: Which characteristic is found in all chordates at some stage of their life cycle?

Answer: A. Notochord — All chordates possess a notochord at least during embryonic development. This is a basic defining feature of Phylum Chordata.

Q: Which of the following belongs to subphylum Urochordata?

Answer: B. Ascidia — Ascidia is a common example of Urochordata. In this group, the notochord is present only in the larval tail region.

Q: In Cephalochordata, the notochord extends throughout the body up to the head region in:

Answer: C. Both larval and adult stages — In cephalochordates like Amphioxus, the notochord extends from head to tail and persists in both larval and adult stages.

ZOOLOGY · CLASS 11 INTERMEDIATE 1 YEAR · Telangana State Board

Practice Unit 4: Animal Diversity - II with a free chapter-wise online MCQ test for Telangana State Board CLASS 11 INTERMEDIATE 1 YEAR ZOOLOGY. This chapter covers: Focusing on phylum Chordata this chapter details subphyla Urochordata Cephalochordata Vertebrata classes of fishes amphibians reptiles birds mammals and type study of Frog.. AI-generated questions from basic to board-exam level, with instant results and explanations.

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Unit 4: Animal Diversity - II — Important Questions & Answers (FAQ)

Frequently asked questions from Telangana State Board CLASS 11 INTERMEDIATE 1 YEAR ZOOLOGY — Unit 4: Animal Diversity - II, with answers and explanations. These are sample questions; the exam has its own separate question set.

Which characteristic is found in all chordates at some stage of their life cycle?

A. Notochord ✓
B. Radial symmetry
C. Exoskeleton
D. Open circulatory system

Answer: A. Notochord
All chordates possess a notochord at least during embryonic development. This is a basic defining feature of Phylum Chordata.

Which of the following belongs to subphylum Urochordata?

A. Balanoglossus
B. Ascidia ✓
C. Amphioxus
D. Labeo

Answer: B. Ascidia
Ascidia is a common example of Urochordata. In this group, the notochord is present only in the larval tail region.

In Cephalochordata, the notochord extends throughout the body up to the head region in:

A. Only the adult stage
B. Only the larval stage
C. Both larval and adult stages ✓
D. Neither larval nor adult stages

Answer: C. Both larval and adult stages
In cephalochordates like Amphioxus, the notochord extends from head to tail and persists in both larval and adult stages.

Which statement best explains the difference between Urochordata and Cephalochordata?

A. Urochordates have notochord only in tail of larva, while cephalochordates retain it throughout life ✓
B. Urochordates are always vertebrates, while cephalochordates are invertebrates
C. Cephalochordates have no notochord at any stage
D. Urochordates have a vertebral column, cephalochordates do not

Answer: A. Urochordates have notochord only in tail of larva, while cephalochordates retain it throughout life
Urochordata show notochord only in the larval tail region, whereas cephalochordates retain the notochord throughout life. This is a key distinction between the two subphyla.

Which statement is correct about the heart of amphibians?

A. It is two-chambered and completely separates oxygenated and deoxygenated blood
B. It is three-chambered with two atria and one ventricle ✓
C. It is four-chambered like birds and mammals
D. It lacks chambers and has only a single blood vessel

Answer: B. It is three-chambered with two atria and one ventricle
Amphibians have a three-chambered heart consisting of two atria and one ventricle. This is a standard feature taught in the frog type study.