12th Grade > Biology
ANIMAL KINGDOM MCQs
Total Questions : 53
| Page 2 of 6 pages
Answer: Option A. -> (i), (iii) and (iv)
:
A
Reptiles generally have a three chambered heart, except a few groups such as crocodiles, which have a four chambered heart. Sea urchin is an echinoderm, and does not have parapodia. Parapodia are locomotory organs found in invertebrates such as annelids (e.g., Nereis). Obeliais a cnidarian that exhibits metagenesis, which is an alternation of generations between an asexual polypoid stage and a sexual medusoid stage. Chondrichthyes is the taxonomic class that includes cartilaginous fishes such as shark. They typically have their skin covered with placoid scales.
:
A
Reptiles generally have a three chambered heart, except a few groups such as crocodiles, which have a four chambered heart. Sea urchin is an echinoderm, and does not have parapodia. Parapodia are locomotory organs found in invertebrates such as annelids (e.g., Nereis). Obeliais a cnidarian that exhibits metagenesis, which is an alternation of generations between an asexual polypoid stage and a sexual medusoid stage. Chondrichthyes is the taxonomic class that includes cartilaginous fishes such as shark. They typically have their skin covered with placoid scales.
Answer: Option C. -> A-i, B-iii, C-v, D-iv, E-ii
:
C
The table matches phyla of the animal kingdom with their respective unique features. Phylum Porifera (sponges) have a unique canal system which is involved in all the major functions of the animal, including feeding, transport of gases, transport of gametes etc. Phylum Ctenophora includes animals commonly known as comb jellies. They generally have eight rows of ciliated comb plates, which help in locomotion. The segmented worms belong to Phylum Annelida, and they apparently exhibit segmentation or metamerism, by which the body is divided into identical segments or metameres. Phylum Arthropoda has the unique feature of jointed appendages (arthros = joint, poda = appendage/leg). Phylum Echinodermata includes animals like the starfish, which have a unique water vascular systemwhich helps in
locomotion, capture and transport of food and respiration.
:
C
The table matches phyla of the animal kingdom with their respective unique features. Phylum Porifera (sponges) have a unique canal system which is involved in all the major functions of the animal, including feeding, transport of gases, transport of gametes etc. Phylum Ctenophora includes animals commonly known as comb jellies. They generally have eight rows of ciliated comb plates, which help in locomotion. The segmented worms belong to Phylum Annelida, and they apparently exhibit segmentation or metamerism, by which the body is divided into identical segments or metameres. Phylum Arthropoda has the unique feature of jointed appendages (arthros = joint, poda = appendage/leg). Phylum Echinodermata includes animals like the starfish, which have a unique water vascular systemwhich helps in
locomotion, capture and transport of food and respiration.
Question 13. Which one of the following groups of three animals each is correctly matched with their one characteristic morphological feature?
AnimalsMorphological featureA. Liver fluke, sea anemone,Bilateral symmetrysea cucumberB. Centipede, prawn, sea urchinJointed appendagesC. Scorpion, spider, cockroachVentral solid nerve cordD. Cockroach, locust, TaeniaMetameric segmentation
AnimalsMorphological featureA. Liver fluke, sea anemone,Bilateral symmetrysea cucumberB. Centipede, prawn, sea urchinJointed appendagesC. Scorpion, spider, cockroachVentral solid nerve cordD. Cockroach, locust, TaeniaMetameric segmentation
Answer: Option C. -> C
:
C
Scorpion, spider and cockroach belong to the phylum Arthropoda, andhave a ventral solid nerve cord. Liver fluke (a flatworm) is bilaterally symmetrical. Sea anemone (a cnidarian) and sea cucumber (an echinoderm) are radially symmetrical. Jointed appendages are characteristic of arthropods and hence, sea urchin (an echinoderm) would not possess them. Metameric segmentation starts with Phylum Annelida, and is present in most higher phyla. Taeniais a flatworm, and does not exhibit metameric segmentation, although the body appears so.Segments of the tapeworm (proglottids) are formed so differently from the segments of groups like Annelids that most zoologists do not admit tapeworms to be metamerically segmented animals.
:
C
Scorpion, spider and cockroach belong to the phylum Arthropoda, andhave a ventral solid nerve cord. Liver fluke (a flatworm) is bilaterally symmetrical. Sea anemone (a cnidarian) and sea cucumber (an echinoderm) are radially symmetrical. Jointed appendages are characteristic of arthropods and hence, sea urchin (an echinoderm) would not possess them. Metameric segmentation starts with Phylum Annelida, and is present in most higher phyla. Taeniais a flatworm, and does not exhibit metameric segmentation, although the body appears so.Segments of the tapeworm (proglottids) are formed so differently from the segments of groups like Annelids that most zoologists do not admit tapeworms to be metamerically segmented animals.
Answer: Option B. -> Mollusca
:
B
Phylum Mollusca, comprised of snails, clams, oysters, squids etc., are the second largest phylum in the Animal Kingdom with respect to the number of species (around 150,000 species) described so far. This follows Phylum Arthropoda, which is the largest phylum in the Animal Kingdom.
:
B
Phylum Mollusca, comprised of snails, clams, oysters, squids etc., are the second largest phylum in the Animal Kingdom with respect to the number of species (around 150,000 species) described so far. This follows Phylum Arthropoda, which is the largest phylum in the Animal Kingdom.
Answer: Option B. -> Crabs possess an endoskeleton.
:
B
Crabs belong to Phylum Arthropoda, the members of which typically have a chitinous exoskeleton, and not an endoskeleton like higher animals.
:
B
Crabs belong to Phylum Arthropoda, the members of which typically have a chitinous exoskeleton, and not an endoskeleton like higher animals.
Answer: Option A. -> Ichthyophis
:
A
Amphibians and many reptiles (except crocodiles) have a three chambered heart. Ichthyophisis an amphibian, and has a three chambered heart. Catlahas a two chambered heart like other fishes. Platypus, being a mammal, has a four chambered heart. Crocodile too, has a four chambered heart, unlike most other reptiles.
:
A
Amphibians and many reptiles (except crocodiles) have a three chambered heart. Ichthyophisis an amphibian, and has a three chambered heart. Catlahas a two chambered heart like other fishes. Platypus, being a mammal, has a four chambered heart. Crocodile too, has a four chambered heart, unlike most other reptiles.
Answer: Option A. -> p - ii, q - i, r - iii
:
A
Wuchereria, Ascaris and Ancylostoma are all common examples of Phylum Aschelminthes. Wuchereria is commonly known as the filarial worm, Ascaris as roundworm and Ancylostoma as hookworm. They are all parasitic forms.
:
A
Wuchereria, Ascaris and Ancylostoma are all common examples of Phylum Aschelminthes. Wuchereria is commonly known as the filarial worm, Ascaris as roundworm and Ancylostoma as hookworm. They are all parasitic forms.
Answer: Option A. -> Both A and R are true and R is the correct explanation of A.
:
A
In platyhelminths,spongy connective tissue (mesenchyme) constitutes the so-called parenchyma and fills the space between organs.So there is no space available for the formation of coelom, as a result, they are acoelomates. The external appearance of flatworms (dorsoventrally flattened) is an indication of their acoelomate nature. This feature is also an adaptation for theirparasitic mode of nutrition. Platyhelminths are triploblastic, indicating that they develop threeprimary germ layers during early embryogenesis. This is another common feature of all flatworms; it is not a reason for their acoelomate nature.
:
A
In platyhelminths,spongy connective tissue (mesenchyme) constitutes the so-called parenchyma and fills the space between organs.So there is no space available for the formation of coelom, as a result, they are acoelomates. The external appearance of flatworms (dorsoventrally flattened) is an indication of their acoelomate nature. This feature is also an adaptation for theirparasitic mode of nutrition. Platyhelminths are triploblastic, indicating that they develop threeprimary germ layers during early embryogenesis. This is another common feature of all flatworms; it is not a reason for their acoelomate nature.
Answer: Option A. -> Jellyfish and Starfish - Radial symmetry
:
A
Based on the type of symmetry they exhibit, organisms are generally categorised as radial and bilateral. Among the options, jellyfish (a cnidarian) and starfish (an echinoderm) exhibit radial symmetry. Tapeworm (a flatworm) and octopus (a mollusc) are both bilaterally symmetrical. Hydra (a cnidarian) is radially symmetrical and shark (a fish) is bilaterally symmetrical. Amoeba, a unicellular organism with no definite shape, can be described as asymmetrical. Sea urchin (an echinoderm) is radially symmetrical.
:
A
Based on the type of symmetry they exhibit, organisms are generally categorised as radial and bilateral. Among the options, jellyfish (a cnidarian) and starfish (an echinoderm) exhibit radial symmetry. Tapeworm (a flatworm) and octopus (a mollusc) are both bilaterally symmetrical. Hydra (a cnidarian) is radially symmetrical and shark (a fish) is bilaterally symmetrical. Amoeba, a unicellular organism with no definite shape, can be described as asymmetrical. Sea urchin (an echinoderm) is radially symmetrical.
Answer: Option B. -> Stinging cells
:
B
Cnidarians possess stinging cells, called cnidocytes or cnidoblasts, which contain stinging capsules or nematocytes. These cnidocytes are present on the tentacles and the body, and are used for anchorage, defense and for the capture of prey. The former name of the phylum was "Coelenterata", which refers to the gastrovascular cavity or "coelenteron" of the animals in this group.
:
B
Cnidarians possess stinging cells, called cnidocytes or cnidoblasts, which contain stinging capsules or nematocytes. These cnidocytes are present on the tentacles and the body, and are used for anchorage, defense and for the capture of prey. The former name of the phylum was "Coelenterata", which refers to the gastrovascular cavity or "coelenteron" of the animals in this group.
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