Chapter 3 ZOOLOGY : Animal Diversity - I (Invertebrate Phyla) — Online MCQ Test
ZOOLOGY · CLASS 11 INTER I YEAR · Andhra State Board
Practice Chapter 3 ZOOLOGY : Animal Diversity - I (Invertebrate Phyla) with a free chapter-wise online MCQ test.
This chapter covers: This chapter covers general characteristics and classification of non-chordate phyla from Porifera to Hemichordata with key evolutionary features..
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Chapter 3 ZOOLOGY : Animal Diversity - I (Invertebrate Phyla) — Important Questions & Answers
Which phylum is commonly known as 'sponges'?
- A. Cnidaria
- B. Porifera
- C. Platyhelminthes
- D. Ctenophora
Answer: B. Porifera
Porifera is the phylum consisting of organisms commonly known as sponges, which are characterized by a pore-bearing body.
Porifera is the phylum consisting of organisms commonly known as sponges, which are characterized by a pore-bearing body.
The presence of cnidoblasts is a characteristic feature of which phylum?
- A. Porifera
- B. Ctenophora
- C. Cnidaria
- D. Mollusca
Answer: C. Cnidaria
Cnidarians possess specialized stinging cells called cnidoblasts used for defense, offense, and anchorage.
Cnidarians possess specialized stinging cells called cnidoblasts used for defense, offense, and anchorage.
Which of the following traits distinguishes Ctenophora from Cnidaria?
- A. Presence of comb plates for locomotion
- B. Diploblastic body organization
- C. Presence of tissue-level organization
- D. Ability to reproduce sexually
Answer: A. Presence of comb plates for locomotion
Ctenophores are unique in possessing eight external rows of ciliated comb plates that aid in locomotion, which are absent in Cnidaria.
Ctenophores are unique in possessing eight external rows of ciliated comb plates that aid in locomotion, which are absent in Cnidaria.
Consider the following: 1. Canal system, 2. Flame cells, 3. Water vascular system, 4. Cnidoblasts. Which sequence correctly matches these features to Porifera, Platyhelminthes, Echinodermata, and Cnidaria respectively?
- A. 1, 2, 4, 3
- B. 1, 2, 3, 4
- C. 2, 1, 3, 4
- D. 4, 3, 2, 1
Answer: B. 1, 2, 3, 4
Canal system is for Porifera, Flame cells for Platyhelminthes, Water vascular system for Echinodermata, and Cnidoblasts for Cnidaria.
Canal system is for Porifera, Flame cells for Platyhelminthes, Water vascular system for Echinodermata, and Cnidoblasts for Cnidaria.
What is the primary evolutionary advantage of the water vascular system in Echinoderms?
- A. Highly efficient respiration through gills.
- B. Locomotion, food capture, and transport of nutrients.
- C. Rapid excretion of nitrogenous wastes.
- D. Sexual reproduction via water currents.
Answer: B. Locomotion, food capture, and transport of nutrients.
The water vascular system is a unique hydraulic system in echinoderms used for locomotion, food and waste transport, and respiration.
The water vascular system is a unique hydraulic system in echinoderms used for locomotion, food and waste transport, and respiration.