Invertebrates are animals, which do not have a vertebral column or backbone. All the animals except for the phylum Vertebrata are invertebrates. Phylum Urochordata and Cephalochordata are closely related to vertebrates. They may be symmetric or asymmetric, with or without true coelom. Invertebrates include all the animals from the phylum Porifera to Echinodermata, Hemichordata, Tunicata and Cephalochordata.
1. Flagellated cells, which line the spongocoel in Poriferans are known as
(a) ostia
(b) mesenchymal cells
(c) choanocytes
(d) oscula
Answer: (c)
2. Which of the following is not a characteristic of the phylum Arthropoda?
(a) Metameric segmentation
(b) Jointed appendages
(c) Chitinous exoskeleton
(d) Parapodia
Answer: (d)
3. This is an example of bilaterally symmetrical and triploblastic animal
(a) cnidarians
(b) sponges
(c) ctenophores
(d) round worms
Answer: (d)
4. Phylum Annelida is not characterized by
(a) segmentation
(b) closed circulatory system
(c) ventral nerve chord
(d) pseudocoelom
Answer: (d)
5. Which of the following contains notochord in the embryonic stage?
(a) Non-chordates
(b) Vertebrates
(c) All chordates
(d) Some of the chordates
Answer: (c)
6. A characteristic feature, which is present only in the phylum Coelenterata is
(a) nematocysts
(b) flame cells
(c) hermaphroditism
(d) polymorphism
Answer: (a)
7. Cnidarians, which exhibit only polyp stage
(a) Cubozoa
(b) Scyphozoa
(c) Anthozoa
(d) Hydrozoa
Answer: (c)
8. Excretion is performed by _______ in flatworms.
(a) protonephridia
(b) flame cells
(c) green glands
(d) malpighian tubules
Answer: (b)
9. The group of molluscs, which possess eyes similar to vertebrates
(a) bivalvia
(b) gastropoda
(c) cephalopoda
(d) pelecypoda
Answer: (c)
10. Tube feet are found in
(a) cuttlefish
(b) crayfish
(c) jellyfish
(d) starfish
Answer: (d)
These were some MCQs on Invertebrates. Learn MCQs on related topics for NEET, at BYJU’S.
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