Which of the following is a connecting link between invertebrates and non-invertebrates?
Sphenodon
Balanoglossus
Tadpole larva
Crocodile
Correct Answer :
B. Balanoglossus
Balanoglossus is a connecting link between invertebrates and non-invertebrates. Balanoglossus belongs to phylum Hemichordata which was earlier considered as a sub-phylum under phylum chordata. But, now it is placed as a separate phylum under non-chordata because notochord and postanal tail are absent in it.
Related Questions
Which of the following statement(s) is/are correct regarding class aves?
(i) The forelimbs are modified into wings and the hindlimbs generally have scales and are modified for walking, swimming or clasping the tree branches.
(ii) Heart is completely four-chambered.
(iii) They are warm- blooded (homoiothermous) animals i.e., they are able to maintain a constant body temperature.
(iv) They are oviparous and development is direct.
Both (i) and (iii)
Both (i) and (iv)
(i), (ii) and (iii)
All of these
Which of the following phylum is being described by the given statements?
(i) They are bilaterally symmetrical,triploblastic, segmented and coelomate animals.
(ii) The body consists of head, thorax, abdomen and have jointed appendages.
(iii) Circulatory system is of open type.
(iv) Excretion takes place through malphigian tubules.
Arthropoda
Annelida
Mollusca
Echinodermata
Animals like annelids, arthropods, etc. where the body can be divided into identical left and right halves in only one plane, exhibit___________symmetry.
radial
bilateral
asymmetrical
non- symmetrical
The figure given below shows the germinal layers marked as A, B, C and D. Identify the label showing undifferentiated layer and its location?
A, Between B & C
B, Between A & C
C, Between C & D
D, Between A & B
Which of the following is not the common fundamental feature for animal classification?
Germinal layers.
Pathway of water transport.
Pattern of organization of cells.
Serial repetition of the segments.
Few cnidarians like corals have a skeleton composed of
calcium hydroxide
calcium sulphate
calcium carbonate
sodium bicarbonate
Which of the following statement(s) is/are correct regarding phylum aschelminthes?
(i) The body is circular in cross-section hence the name roundworms.
(ii) Alimentary canal is complete with a well-developed muscular pharynx.
(iii) Sexes are separate (dioecious), i.e., males and females are distinct.
(iv) Nephridia help in osmoregulation and excretion.
(i) and (ii)
(iii) and (iv)
(i), (ii) and (iii)
All of these
Which of the following is not a characteristic of phylum echinodermata ?
They have a water vascular system.
They have an internal skeleton.
They are protostomes.
They have bilateral symmetry at larval stage.
Refer the following animals and identify those which have a fluid filled body cavity with a complete lining derived from mesoderm.
(i) Sycon (ii) Butterfly
(iii) Nereis (iv) Sea fan
(v) Scorpion (vi) Pila
(i) and (iii) only
(ii) and (iv) only
(ii), (iii), (v) and (vi) only
All of these
Which of the following characteristic is probably most responsible for the great diversification of insects on land ?
Segmentation
Antennae
Bilateral symmetry
Exoskeleton
The following statement are associated with the occurrence of notochord. Identify the incorrect statement.
It is present only in larval tail in ascidians.
It is replaced by a vertebral column in adult frog.
It is absent throughout the life in humans from the very beginning.
It is present throughout life in Amphioxus.
Flame cells present in platyhelminthes, are specialized in
respiration and absorption.
osmoregulation and circulation.
respiration and excretion.
osmoregulation and excretion.
The transition from aquatic to terrestrial lifestyles required many adaptations in the vertebrate lineage. Which of the following is not one of those adaptations ?
Switch from gill respiration to air-breathing lungs.
Improvements in water resistance of skin.
Alteration in mode of locomotion.
Development of feathers for insulation.
Which of the following is a living fossil?
Balanoglossus
Echinus
Ancylostoma
Limulus
Which of the following group of animals reproduces only by sexual means?
Ctenophora
Cnidaria
Porifera
Protozoa
Which one of the following statement regarding coelom of given animals is correct?
Round worms (aschelminthes) are pseudocoelomates.
Molluscs are acoelomates.
Insects are pseudocoelomates.
Flatworms (platyhelminthes) are coelomates.
Which of the following possesses poison sting and belongs to class chondrichthyes?
Labeo
Myxine
Clarias
Trygon
Column I contains zoological names of animals and column II contains their common name. Match the following and choose the correct option.
| Column -I | Column- II |
|---|---|
| A. Physalia | I. Sea anemone |
| B. Meandrina | II. Brain coral |
| C. Gorgonia | III. Sea fan |
| D. Adamsia | IV. Portuguese man-of-war |
A III; B II; C I; D IV
A IV; B III; C II; D I
A IV; B II; C III; D I
A II; B III; C I; D IV
Match the organisms given in column-I with their common name given in column-II and choose the correct option.
| Column -I | Column -II |
|---|---|
| (Organisms) | (Comman name) |
| A. Pennatula | I. Sea-lily |
| B. Antedon | II. Sea- pen |
| C. Echinus | III. Sea-urchin |
| D. Cucumaria | IV. Sea - cucumber |
A II; C III; D I; E IV
A II; C IV; D I; E III
A II; C I; D III; E IV
A II; C I; D III; E IV
Identify the figure with its correct name and phylum.
Cucumaria – Echinodermata
Ascidia – Urochordata
Balanoglossus – Hemichordata
Hirudinaria – Annelida
Which of the following statements (i - v) are correct ?
(i) The pelvic fins of female sharks bear claspers.
(ii) In Obelia, polyps produce medusae sexually and medusae form the polyps asexually.
(iii) Flame cells in platyhelminthes help in osmoregulation and excretion.
(iv) In non-chordates, central nervous system is ventral, solid and double.
(v) Pinnae are present in mammals.
(ii), (iv) and (v)
(i), (iii) and (v)
(iii), (iv) and (v)
(i), (ii) and (iii)
Identify the animals shown in the given figures A, B and C from options given below.
A - Octopus; B -Asterias, C- Ophiura
A - Asterias; B - Ophiura, C- Octopus
A - Echinus; B - Octopus C - Ophiura
A - Ophiura; B - Echinus, C- Octopus
Which of the following feature in birds indicates their reptilian ancestory ?
Eggs with a calcareous shell
Scales on their hind limbs
Four-chambered heart
Two special chambers-crop and gizzard in their digestive tract
Which of the following is not a characteristic feature of kingdom animalia ?
Storage of carbohydrates as starch.
Multicellularity.
Obtaining nutrients by ingestion.
Having eukaryotic cells without walls.
The figure given below is the characteristic structure of the phylum in which animals are aquatic, free swimming or sessile, mostly marine, radially symmetrical. Identify the phylum and correct function of the structure.
Ctenophora; Emission of light.
Porifera; Feeding, respiration and excretion.
Cnidarian; Anchorage, Defense and food capturing
Mollusca; Locomotion, transport of food and respiration.
The organisms attached to the substratum generally possess
one single opening to the digestive canal.
cilia on the surface to create water current.
radial symmetry.
asymmetrical body.
Refer the types of cells present in some animals. Each cell is specialized to perform a single specific function except
Cnidocytes
Choanocytes
Interstitial cells
Gastrodermal cells
In ctenophora, the body bears _______ external rows of ciliated comb plates, which help in locomotion.
five
six
seven
eight
Match the characteristic feature/terms given in column I with the phylum to which they belongs given in column II and choose the correct option.
| Column-I | Column-II |
|---|---|
| (Characteristic feature/term) | (Phylum) |
| A. Choanocytes | I. Platyhelminthes |
| B. Cnidoblasts | II. Ctenophora |
| C. Flame cells | III. Porifera |
| D. Nephridia | IV. Coelenterata |
| E. Comb plates | V. Annelida |
A II; B I; C IV; D V; E III
A II; B IV; C I; D V; E III
A V; B I; C III; D II; E IV
A III; B IV; C I; D V; E II
Which of the following statement(s) is/are correct for class amphibia?
(i) Body is divisible into head and trunk.
(ii) Respiration is through gills only.
(iii) The heart is two chambered i.e. one auricle and one ventricle.
(iv) Fertilization is internal.
Only (i)
Only (iv)
(i), (ii) and (iii)
All of these