Which of the following is not a feature of birds?
1. Forelimbs modified into wings
2. Single occipital condyle
3. Ten pairs of cranial nerves
4. Four-chambered heart
In some Bilateria, the body is of many segments that show serial repetition of parts. Such segments are called as:
1. Myotomes
2. Metameres
3. Proglottides
4. Comb plates
The phylum with exclusively marine animals is:
1. Porifera
2. Cnidaria
3. Ctenophora
4. Platyhelminthes
Chordates are not characterized by:
(1) Ventral nerve cord
(2) Post anal tail
(3) Gill slits
(4) A notochord
Notochord is derived from embryonic:
1. Ectoderm
2. Mesoderm
3. Endoderm
4.Ectoderm and Mesoderm
Identify the phylum where the body cavity is not lined by mesoderm, instead, the mesoderm is present as scattered pouches between ectoderm and endoderm?
1. Cnidaria
2. Platyhelminthes
3. Molluska
4. Aschelminthes
What is present between ectoderm and endoderm in diploblastic animals?
1. Mesenteron
2. Mesenchyme
3. Mesorchium
4. Mesoglea
“Amniotes” do not include:
1. Amphibians
2. Reptiles
3. Birds
4. Mammals
The presence of mutable collagenous tissue is an important feature of:
(1) Annelida
(2) Echinodermata
(3) Porifera
(4) Molluska
Closed circulatory system is not seen in:
(1) Vertebrates
(2) Annelids
(3) Cephalopod Mollusks
(4) Aquatic Arthropods
Which of the following statements is not true about Nematodes?
1. They are bilaterally symmetrical, un-segmented worms.
2. They are covered with a flexible, thick cuticle that is molted four times as they grow.
3. They possess cilia or flagella on their reproductive cells.
4. They possess a hydrostatic skeleton.
What is not true regarding Cnidarians?
1. | Body is made up of distinct tissues but true organs have not evolved |
2. | They are carnivores |
3. | They may have two body forms – polyps and medusa |
4. | The digestion is completely intra-cellular |
Radially symmetrical animals:
1. Are all triploblastic
2. Tend to be sessile and passively floating
3. Have a definite head and a brain
4. Have an anterior and a posterior end
Ascaris is characterized by:
1. Presence of true coelom but an absence of metamerism
2. Presence of true coelom and of metamerism
3. Absence of true coelom but the presence of metamerism
4. Presence of neither true coelom nor metamerism
Identify the chordates in which the notochord persists in the adult?
(1) Tunicates
(2) Lancelets
(3) Cyclostomata
(4) Bony fishes
An important evolutionary transition that appeared for the first time in Echinoderms is:
1. | Bilateral symmetry | 2. | Radial symmetry |
3. | Tube within a tube plan | 4. | Endoskeleton |
How many of the given animals do not possess a true coelom?
Pila, Asterias, Balanoglossus, Ascidia, Aplysia, Ophiura, Wuchereria, Limulus, Antedon, Dentallium, Nereis
(1) 1
(2) 5
(3) 6
(4) 7
Which of the following is not a feature of Ctenophora?
1. Diploblastic organisms with tissue level of organization
2. Absence of Cnidocytes
3. Presence of internal ciliated comb plates
4. Bio-luminescence well marked in some members
Which of the following sets contains all animals belonging to the same Class?
(1) Columba, Struthio, Aptenodytes, Pteropus
(2) Bangarus, Chelone, Neophron, Testudo
(3) Petromyzon, Myxine, Doliolum, Salpa
(4) Exocoetus, Hippocampus, Betta, Pterophyllum
Identify the incorrect statement regarding Osteichthyes?
(1) Gills with operculum
(2) Skin covered by placoid scales
(3) Presence of swim bladder
(4) Mostly oviparous
In Amphibia:
I. Skin is moist without scales
II. A tympanum represents the ear
III. Fertilization is external
1. Only I and II are correct.
2. Only I and III are correct.
3. Only II and III are correct.
4. I, II, and III are correct.
In which of the following animals, the body is cylindrical and is composed of an anterior proboscis, a collar, and a long trunk?
1. Hemichordates
2. Urochordates
3. Cephalochordates
4. Vertebrate chordates
Perhaps the biggest reason for the enormous success of Arthropods is?
1. Chitinous exoskeleton
2. Diverse appendages
3. Respiration by tracheoles
4. Internal fertilization
Development takes place through a trochophore or veliger larva in:
(1) Annelida
(2) Molluska
(3) Arthropoda
(4) Echinodermata
The most important reason for the fact that reptiles were the first animals to be successful on land is:
1. Internal fertilization
2. Skin covered with scales
3. Partially divided ventricles
4. Presence of amnion
A sort of alternation and generation seen in Cnidarians is termed as:
1. Metamorphosis
2. Epiboly
3. Metagenesis
4. Anagenesis
Pinworm, Hookworm and Filaria worm belong to:
1. Annelida
2. Platyhelminthes
3. Aschelminthes
4. Arthropoda
Bilharzia is caused by a/an:
1. Flatworm
2. Roundworm
3. Annelid
4. Arthropod
Which of the following is not a character of deuterostomes?
1. | Radial cleavage |
2. | Schizocoelous coelom |
3. | Indeterminate cleavage |
4. | Blastopore forms anus |
Identify the incorrect statement regarding Class Cyclostomata:
1. All are ectoparasites on some fishes.
2. They have sucking and circular mouths without jaws.
3. Their body is devoid of scaled and paired fins.
4. The circulatory system is of open type.
Which of the following does not belong to Protostomia?
(1) Annelids
(2) Mollusks
(3) Echinoderms
(4) Arthropods
Approximately what percentage of existing animal species are invertebrates?
1. | 20 | 2. | 50 |
3. | 70 | 4. | 95 |
In contrast to Annelids the Platyhelminths show
1. Absence of body cavity
2. Presence of pseudocoel
3. Radial symmetry
4. Bilateral symmetry
Which of the following characters is not typical of the class Mammalia -
1. Alveolar lungs
2. Ten pairs of cranial nerves
3. Seven cervical vertebrae
4. Thecodont dentition
The number of correct statements amongst the given statements is:
I. The digestive system in Platyhelminthes is incomplete.
II. Coelenterates, Ctenophores, and Echinoderm larvae are radially symmetrical.
III. Bilateral symmetry is seen in annelids and arthropods but not in mollusks.
IV. Notochord is a mesodermally derived structure formed on the dorsal side in some animals.
V. Aschelminthes are pseudocoelomates
1. 2
2. 3
3. 4
4. 5
The number of correct statements, regarding cockroaches, among the given statements is:
I. | Dorsal sclerites are called sternites and ventral sclerites are called tergites. |
II. | While the labrum is the upper lip and the labium is the lower lip, the hypopharynx acts as the tongue. |
III. | Anal cerci are seen in both sexes but anal styles are found in male cockroaches only. |
IV. | Each thoracic segment bears a pair of walking legs. |
V. | Forewings called tegmina are used in flight while the hind wings are opaque, dark, and leathery. |
1. 2
2. 3
3. 4
4. 5
Which of the following would be a characteristic of the animal shown in the given diagram?
1. Excretory organ is the proboscis gland.
2. They migrate for spawning to fresh water.
3. Notochord is present only in the larval tail.
4. Parapodia are present for swimming.
Match each item in Column I with one in Column II and choose your answer from the codes given below:
Animal Feature
A. Obelia a. Water vascular system
B. Antedon b. Air bladder
C. Pterophyllum c. Metagenesis
D. Icthyophis d. Limbless amphibian
A. B. C. D.
1. c a b d
2. c b a d
3. b a c d
4. d b a c
All cyclostomes are ___________ on some fishes; paired fins are _________, cranium is ________ and circulation is _______ type.
1. Ectoparasites, Absent, Cartilaginous, Open
2. Endoparasites, Present, Bony, Closed
3. Ectoparasites, Absent, Cartilaginous, Closed
4. Ectoparasites, Present, Cartilaginous, Open
Given below are a few statements related to external fertilization. Choose the correct statements
(i) The male and female gametes are formed and released simultaneously
(ii) Only a few gametes are released into the medium
(iii) Water is the medium in a majority of organisms exhibiting external fertilization
(iv) Offspring formed as a result of external fertilization have better chance of survival than those formed inside an organism
1. iii and iv
2. i and iii
3. ii and iv
4. i and iv
Which of the following combinations of phylum and description is incorrect?
1. Cnidaria Radial symmetry, Diploblastic, Metagenesis
2. Molluska Protostome, Segmented body, Radula
3. Echinodermata Deuterotome, Eucoelomate, Water vascular system
4. Arthropoda Triploblastic, Chitinous exoskeleton, Jointed appendages
Which of the following terms describes the reproduction of sharks?
1. internal fertilization, and a range from oviparity to viviparity
2. internal fertilization, oviparity only
3. external fertilization, and a range from oviparity to viviparity
4. external fertilization, viviparity only
Which of the following is not a characteristic of all species of birds?
1. flight
2. ovipary
3. feathers
4. four-chambered heart
Similarity between protochordata and hemichordata is
1. Presence of notochord.
2. Exclusively marine.
3. Dorsal hollow and single central nervous system.
4. Exclusively parasitic.
Which of the following animals exhibit all these characters – bilateral symmetry, triploblastic, segmented and eucoelomate?
1. Echinoderms
2. Roundworms
3. Molluscs
4. Annelids
What is incorrect regarding cyclostomes?
1. They are ectoparasites on some fishes
2. They have a circular mouth without jaws
3. Circulation is of open type
4. They are marine but migrate to fresh water for spawning
Identify the incorrectly matched pair:
Animal Characteristic feature
1. Adamsia Cnidocyte
2. Pleurobrachia Comb plates
3. Hook worm Pseudocoelomate
4. Dentalium Water vascular system
Which of the following is an oviparous mammal?
1. Balaenoptera
2. Ornithorhynchus
3. Macropus
4. Delphinus
Consider the following characters:
I. Bilaterally symmetrical, triploblastic and coelomate animals.
II. A mantle cavity in which feather like gills re-present.
III. Mouth contains radula – an organ for feeding.
Such organisms will belong to the phylum:
1. Annelida
2. Echinodermata
3. Mollusca
4. Hemichordata
Which of the following is not a fresh water bony fish?
1. Labeo
2. Catla
3. Clarias
4. Exocoetus