Mix Examples - Animal Kingdom Questions in English

(A) The correct matching is as follows:
$A$. Pterophyllum is commonly known as Angel fish $(A-III)$.
$B$. Myxine is commonly known as Hag fish $(B-I)$.
$C$. Pristis is commonly known as Saw fish $(C-II)$.
$D$. Exocoetus is commonly known as Flying fish $(D-IV)$.
Therefore, the correct sequence is $A-III, B-I, C-II, D-IV$.

(A) The correct answer is $A$ only.
$1$. Annelids possess a true coelom (body cavity lined by mesoderm),making them true coelomates.
$2$. Poriferans lack a body cavity and are acoelomates.
$3$. Aschelminthes possess a body cavity that is not lined by mesoderm,making them pseudocoelomates.
$4$. Platyhelminthes lack a body cavity and are acoelomates.
Therefore,only statement $A$ is correct.

(B) In $Annelida$,$Nereis$ is an aquatic form which possesses lateral appendages called parapodia,which help in swimming. Thus,option $A$ is correct.
In $Echinodermata$,the body is covered by an endoskeleton of calcareous ossicles,not a chitinous exoskeleton. Chitinous exoskeletons are characteristic of the phylum $Arthropoda$. Thus,option $B$ is the incorrect match.
In $Aschelminthes$ (roundworms),sexual dimorphism is present where females are generally longer than males. Thus,option $C$ is correct.
In $Amphibia$,the body is divisible into head and trunk,and many members have a tail. Thus,option $D$ is correct.

(A) The correct pair is $A$ (Arthropoda $-$ Silver fish).
$1$. Silver fish $(Lepisma)$ belongs to the phylum Arthropoda,class Insecta.
$2$. Cuttle fish $(Sepia)$ belongs to the phylum Mollusca,not Echinodermata.
$3$. Jelly fish $(Aurelia)$ belongs to the phylum Cnidaria (Coelenterata),not Pisces.
$4$. Star fish $(Asterias)$ belongs to the phylum Echinodermata,not Mollusca.

(D) An oviparous animal is one that lays eggs.
$1$. $Crocodile$ is a reptile that is oviparous and possesses a four-chambered heart.
$2$. $Corvus$ (crow) is a bird that is oviparous and possesses a four-chambered heart.
$3$. $Platypus$ is a monotreme mammal that is oviparous and possesses a four-chambered heart.
Since all three options are oviparous and have a four-chambered heart, the correct answer is $All \text{ of the above}$.

(D) Statement $D$ is incorrect because respiration in adult amphibians primarily occurs through lungs and skin. While larval stages (tadpoles) respire through gills,adult amphibians do not possess gills. Therefore,the statement implying that all amphibians respire through gills,lungs,and skin simultaneously is inaccurate.
- Cyclostomes (like lampreys) are indeed marine but migrate to fresh water for spawning.
- Arthropods constitute the largest phylum,comprising over two-thirds (not just one-third) of all named species,but the statement 'over one-third' is factually true as it is a subset of the total.
- Platyhelminthes (flatworms) are predominantly endoparasites in animals.

(D) Metameric segmentation is a characteristic feature where the body is divided into repeating segments.
$1$. $Annelida$ exhibit true metamerism,possess a true coelom (schizocoelom),and have a closed circulatory system.
$2$. $Chordata$ also exhibit metamerism (seen in the arrangement of muscles and vertebrae),possess a true coelom (enterocoelom),and have a closed circulatory system.
$3$. $Arthropoda$ show metamerism but have an open circulatory system.
$4$. $Mollusca$ generally do not show metamerism and have an open circulatory system (except for Cephalopods).
Therefore,both $Annelida$ and $Chordata$ satisfy all the given criteria.

(D) $1$. $A$: $Pheretima$ (earthworm) is hermaphrodite (bisexual),so this option is incorrect.
$2$. $B$: $Spongilla$ (freshwater sponge) exhibits external fertilization,so this option is incorrect.
$3$. $C$: $Balaenoptera$ (blue whale) is a mammal and has skin with hair,not scales,so this option is incorrect.
$4$. $D$: $Psittacula$ (parrot) is a bird,$Delphinus$ (dolphin) is a mammal,and $Struthio$ (ostrich) is a bird. All three are homoiothermous (warm-blooded) animals. Thus,this is the correct matching.

(A) In option $A$,the character 'Flame cells' is incorrectly matched with Cephalochordata. Flame cells (protonephridia) are the excretory organs found in Phylum Platyhelminthes (e.g.,Taenia). Cephalochordates like Branchiostoma possess protonephridia with solenocytes for excretion,but they are not termed 'Flame cells'.
In option $B$,Urochordata members are exclusively marine,and Doliolum is a correct example.
In option $C$,Ctenophores exhibit bioluminescence,and Pleurobrachia is a representative genus.
In option $D$,Balanoglossus belongs to Hemichordata (often studied alongside Chordata due to notochord-like structures),and it exhibits bilateral symmetry.

(C) Let us analyze the given characteristics:
$(1)$ Polymorphism: Seen in Coelenterata (e.g.,Obelia).
$(2)$ Metagenesis: Seen in Coelenterata (alternation of generation between polyp and medusa).
$(3)$ Metamorphosis: Common in many phyla,including Porifera and Coelenterata.
$(4)$ Canal system: Characteristic of Porifera.
$(5)$ Cnidoblast cells: Characteristic of Coelenterata.
$(6)$ Blind sac body plan: Characteristic of Coelenterata.
Evaluating the options:
- Option $(A)$ is incorrect because $(1)$ and $(2)$ are features of Coelenterata,not Porifera.
- Option $(B)$ is incorrect because the canal system $(4)$ is a feature of Porifera,not Coelenterata.
- Option $(C)$ is correct because metamorphosis $(3)$ is a developmental process observed in the life cycles of both Porifera and Coelenterata.
- Option $(D)$ is incorrect as most listed features are specific to Coelenterata.

(C) The correct matches are as follows:
$1$. Starfish is known as $Asterias$ (belongs to Phylum Echinodermata).
$2$. Jellyfish is known as $Aurelia$ (belongs to Phylum Cnidaria).
$3$. Devilfish is known as $Octopus$ (belongs to Phylum Mollusca).
$4$. Cuttlefish is known as $Sepia$ (belongs to Phylum Mollusca).
Therefore, the correct combination is: $A-q, B-r, C-s, D-p$.

(A) Viviparous animals are those that give birth to young ones. Among the given examples:
$1$. $Corvus$ (Crow) - Oviparous
$2$. $Columba$ (Pigeon) - Oviparous
$3$. $Macropus$ (Kangaroo) - Viviparous
$4$. $Pteropus$ (Flying fox) - Viviparous
$5$. $Calotes$ (Garden lizard) - Oviparous
$6$. $Hemidactylus$ (Wall lizard) - Oviparous
$7$. $Psittacula$ (Parrot) - Oviparous
$8$. $Struthio$ (Ostrich) - Oviparous
$9$. $Macaca$ (Monkey) - Viviparous
Thus,there are $3$ viviparous animals: $Macropus$,$Pteropus$,and $Macaca$.

(C) Statement-$1$ is correct because most sponges (phylum Porifera) exhibit asymmetry,meaning they cannot be divided into two equal halves by any plane passing through the center.
Statement-$2$ is incorrect because metamerism (true segmentation) is not present in Platyhelminthes. It is a characteristic feature primarily observed in Annelida,Arthropoda,and Chordata. Therefore,the correct option is $C$.

(A) The correct matches are as follows:
$1$. Sea fan is the common name for $Gorgonia$ (Phylum Cnidaria).
$2$. Sea hare is the common name for $Aplysia$ (Phylum Mollusca).
$3$. Radial symmetry is exhibited by $Mandarina$ (a type of sea urchin/echinoderm).
$4$. Endoparasite is represented by $Taenia$ (Tapeworm,Phylum Platyhelminthes).
Therefore,the correct sequence is $(a) \rightarrow iii, (b) \rightarrow iv, (c) \rightarrow i, (d) \rightarrow ii$.

(B) To determine which set does not belong to the same class,let's analyze each option:
$A$: $Macropus$ (Kangaroo),$Pteropus$ (Flying fox),and $Elephas$ (Elephant) all belong to Class $Mammalia$.
$B$: $Delphinus$ (Dolphin) and Blue whale are mammals (Class $Mammalia$),whereas Shark belongs to Class $Chondrichthyes$ (Cartilaginous fishes). Thus,this set contains animals from different classes.
$C$: $Naja$ (Cobra),$Vipera$ (Viper),and $Bungarus$ (Krait) all belong to Class $Reptilia$.
$D$: $Neophron$ (Vulture),$Pavo$ (Peacock),and $Struthio$ (Ostrich) all belong to Class $Aves$.
Therefore,the correct option is $B$.

(B) The correct matches are as follows:
$1$. Sea walnut is $Pleurobrachia$,not $Ctenoplana$.
$2$. Sea hare is $Aplysia$,not $Chiton$ ($Chiton$ is known as the coat-of-mail shell).
$3$. Sea cucumber is $Cucumaria$.
$4$. Sea fur is $Obelia$.
Since both options $A$ and $B$ contain incorrect matches,in the context of standard biology questions,$Sea$ $hare$ is specifically $Aplysia$,and $Chiton$ is a distinct mollusk. However,$Sea$ $walnut$ is $Pleurobrachia$. Given the options,$B$ is the most commonly cited incorrect match in competitive examinations.

(C) Let's analyze the characteristics provided:
$(i)$ Habitat: Cyclostomata are marine but migrate to fresh water for spawning. Chondrichthyes are mostly marine. Osteichthyes are found in both marine and fresh water. The table provided in the question has incorrect habitat assignments.
(ii) Mouth: Cyclostomata have a sucking and circular mouth. Chondrichthyes have a ventral mouth. Osteichthyes have a terminal mouth. This statement is correct.
(iii) Gill Slits: Cyclostomata have $6-15$ pairs of gill slits. Chondrichthyes have $5-7$ pairs. Osteichthyes have $4$ pairs. This statement is correct.
(iv) Scales: Cyclostomata lack scales. Chondrichthyes have placoid scales. Osteichthyes have cycloid or ctenoid scales. The table provided in the question incorrectly assigns placoid scales to Cyclostomata.
$(v)$ Fins: Cyclostomata have unpaired fins. Chondrichthyes and Osteichthyes have paired fins. This statement is correct.
Therefore,statements $(ii), (iii),$ and $(v)$ are correct.

(B) Statement $(A)$ is correct: Earthworms (Annelida) exhibit true metameric segmentation where the body is externally and internally divided into segments called metameres.
Statement $(B)$ is correct: Platyhelminthes (flatworms) are the first phylum to exhibit an organ level of body organization.
Statement $(C)$ is incorrect: Aschelminthes (roundworms) are triploblastic,meaning they have three germ layers (ectoderm,mesoderm,and endoderm). Mesogloea is a characteristic of Cnidarians (diploblastic animals),not Aschelminthes.
Therefore,only statements $(A)$ and $(B)$ are correct.

(D) The correct answer is $D$ (Rohu).
$Unio$ belongs to the phylum $Mollusca$.
$Star fish$ belongs to the phylum $Echinodermata$.
$Balanoglossus$ belongs to the phylum $Hemichordata$.
$Rohu$ ($Labeo$ $rohita$) belongs to the phylum $Chordata$ (Class: $Osteichthyes$).
Since $Unio$,$Star fish$,and $Balanoglossus$ are all non-chordates (invertebrates),while $Rohu$ is a chordate (vertebrate),$Rohu$ is the odd one out.

(A) Statement-$I$ is correct: Cyclostomata are jawless vertebrates. They belong to the class Cyclostomata,which is characterized by the absence of true jaws.
Statement-$II$ is correct: Urochordates (also known as Tunicates) are protochordates where the notochord is present only in the larval tail. They do not possess a vertebral column; hence,they are non-vertebrate chordates.
Therefore,both statements are correct.

(D) $1$. $Pteropus$ (flying fox) is a mammal that shows viviparity,but $Ornithorhynchus$ (platypus) is an oviparous (egg-laying) mammal. Thus,this pair is incorrect.
$2$. Garden lizard is a reptile with a three-chambered heart,but the Crocodile is a reptile that possesses a four-chambered heart. Thus,this pair is incorrect.
$3$. $Ascaris$ (roundworm) belongs to Phylum Aschelminthes,which are pseudocoelomates and do not show metameric segmentation. $Ancylostoma$ (hookworm) also belongs to Aschelminthes. Thus,this pair is incorrect.
$4$. Sea horse $(Hippocampus)$ and Flying fish $(Exocoetus)$ both belong to the class Osteichthyes (bony fishes). All fishes are poikilothermal (cold-blooded) animals,meaning their body temperature changes with the environment. Thus,this pair is correct.

(C) The correct matches are as follows:
$1$. Pennatula is commonly known as Sea-pen $(A-ii)$
$2$. Gorgonia is commonly known as Sea-fan $(B-i)$
$3$. Adamsia is commonly known as Sea-Anemone $(C-iii)$
$4$. Cucumaria is commonly known as Sea-cucumber $(D-iv)$
Therefore, the correct sequence is $A-ii, B-i, C-iii, D-iv$, which corresponds to option $C$.

(A) $Cirrhinus$ is a freshwater fish,commonly known as mrigal carp.
$Harpadon$ (Bombay duck),$Sardinella$ (sardines),and $Rastrelliger$ (mackerel) are all examples of marine fish.

(C) Endoparasites live inside the host body where they obtain pre-digested food. Therefore,they do not require a complex digestive system. The loss of the digestive system is a characteristic adaptation in endoparasites,whereas a well-developed digestive system is not.

(D) The levels of organization in animals are classified as follows:
$1$. $A$. Organ level: $Fasciola$ (Platyhelminthes) exhibits organ level of organization.
$2$. $B$. Cellular aggregate level: $Spongilla$ (Porifera) exhibits cellular aggregate level of organization.
$3$. $C$. Tissue level: $Obelia$ (Cnidaria) exhibits tissue level of organization.
$4$. $D$. Organ system level: $Pheretima$ (Annelida) exhibits organ system level of organization.
Therefore,the correct matching is $A-q, B-r, C-s, D-p$.

(D) The correct matching is $A-p, B-s, C-q, D-r$.
$1$. Aptenodytes (Penguin) belongs to the class Aves.
$2$. Hemidactylus (Wall lizard) belongs to the class Reptilia.
$3$. Carcharodon (Great white shark) belongs to the class Chondrichthyes.
$4$. Pteropus (Flying fox) belongs to the class Mammalia.
Therefore,the correct option is $D$.

(C) The correct option is $C$.
$1$. Scorpion,Spider,and Cockroach all belong to the phylum Arthropoda. $A$ characteristic feature of arthropods is the presence of a ventral solid nerve cord.
$2$. In option $A$,Sea urchin (Echinodermata) does not have jointed appendages; these are characteristic of Arthropoda.
$3$. In option $B$,Taenia (Platyhelminthes) is acoelomate and does not exhibit metameric segmentation.
$4$. In option $D$,Sea anemone (Cnidaria) exhibits radial symmetry,not bilateral symmetry.

(D) Echinodermata - Asteroidea - Starfish.
Starfish belongs to the phylum Echinodermata and the class Asteroidea,making this a correct match.
Spiders belong to the class Arachnida,not Insecta,within the phylum Arthropoda.
Unio is a bivalve mollusk belonging to the class Bivalvia,not Cephalopoda.
Planaria belongs to the class Turbellaria,not Trematoda,within the phylum Platyhelminthes.

(A) The correct matches are as follows:
$A$. Planula is the larval stage of $Cnidaria$ (Coelenterata).
$B$. Tornaria is the characteristic larva of $Hemichordata$.
$C$. Trochophore is a larval stage found in $Annelida$.
$D$. Bipinnaria is the larval stage of $Echinodermata$.
$E$. Glochidium is the specialized larval stage of freshwater bivalve $Mollusca$.
Therefore, the correct matching is $A-1, B-2, C-3, D-4, E-5$.

(B) The correct answer is $B$. Parasites have evolved various adaptations to survive within or on their hosts. These include the loss of unnecessary sense organs,the development of adhesive organs or suckers for attachment,the loss of a complex digestive system (as they absorb predigested food),and a high reproductive capacity to ensure the continuation of their species. Therefore,the absence of adhesive organs or suckers is not a parasitic adaptation; rather,their presence is a key adaptation.

(B) Statement $A$ is correct: Platyhelminthes have an incomplete digestive system.
Statement $B$ is incorrect: Adult Echinoderms exhibit radial symmetry,while their larvae exhibit bilateral symmetry.
Statement $C$ is correct: Aschelminthes are pseudocoelomates.
Statement $D$ is correct: In class Chondrichthyes,the notochord is persistent throughout life.
Statement $E$ is incorrect: Reptiles are poikilothermic (cold-blooded) animals and cannot maintain a constant body temperature.
Therefore,the incorrect statements are $B$ and $E$.