Which of the following features distinguish mammals from other vertebrates ?
Hairy skin and oviparity
Hairy skin and mammary glands
Mammary glands and teeth
Pinna and teeth
Correct Answer :
B. Hairy skin and mammary glands
The most unique mammalian characteristic is the presence of milk producing glands (mammary glands) by which the young ones are nourished. The skin of mammals is unique in possessing hair.
Related Questions
Which of the following group of animals reproduces only by sexual means?
Ctenophora
Cnidaria
Porifera
Protozoa
In amphibians, respiration occurs through
gills
lungs
skin
all of these
Which of the following is a connecting link between invertebrates and non-invertebrates?
Sphenodon
Balanoglossus
Tadpole larva
Crocodile
Which of the following statements (i – v) are incorrect ?
- Circulatory system in arthropods is of closed type.
- Parapodia in annelids helps in swimming.
- Phylum mollusca is the second largest animal phylum.
- Aschelminthes are dioecious.
(i) only
(iii) only
(i) and (iii)
(iii) and (iv)
In which of the phylum, excretory organ like proboscis gland is present?
Hemichordata
Chordata
Echinodermata
Annelida
Which of the following is not a chordate character?
Presence of paired pharyngeal gill slits
Ventral heart
Solid and ventral nerve cord
Presence of post-anal tail
Which of the follwoing statement(s) is/are correct?
(i) Organ systems in different group of animals show various patterns of complexities.
(ii) The digestive system in platyhelminthes has only a single opening to the outside of the body that serve as both mouth and anus, and is hence called complete.
(iii) In open type of circulatory system, the blood is pumped out of the heart and the cells and tissues are directly bathed in it.
(iv) In closed type, the blood is circulated through a series of vessels of varying diameters (arteries, veins and capillaries).
Only (i)
Both (ii) and (iii)
(i), (iii) and (iv)
All of these
Which of the following animal's body is covered by calcareous shell and unsegmented with a distinct head, muscular foot, and visceral hump?
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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 one of the following categories of animals is correctly described with no single exception in it?
In chondrichthyes notochord is persistent throughout life.
All mammals are viviparous and possess diaphragm for breathing.
All sponges are marine.
All reptiles possess scales, have a three chambered heart and are cold blooded (poikilothermal).
In ctenophora, the body bears _______ external rows of ciliated comb plates, which help in locomotion.
five
six
seven
eight
Which of the following is a fresh water sponge?
Sycon
Euspongia
Spongilla
Pleurobrachia
Identify the correct characteristic feature shown by the given figure?
Diploblastic in nature.
Having radial symmetrical body.
Dioecious with direct development.
Presence of sensory tentacles on anterior head region.
Which of the following pairs of animals comprises jawless fishes?
Mackerals and rohu
Lampreys and hag fishes
Guppies and hag fishes
Lampreys and eels
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 given figures (A & B) shows the germinal layer. The animals having structures shown in the figures are respectively called
diploblastic, triploblastic
triploblastic, diploblastic
diploblastic, diploblastic
triploblastic, triploblastic
Identify the figures A, B and C and choose the correct option.
A - Male Ascaris, B - Hirudinaria (leech), C- Nereis
A - Female Ascaris, B - Nereis, C-Hirudinaria (leech)
A - Female Ascaris B- Hirudinaria (leech), C - Nereis
A - Male Ascaris, B - Nereis, C- Hirudinaria (leech)
Which of the following possesses electric organs and belongs to class chondrichthyes?
Torpedo
Petromyzon
Trygon
Exocoetus
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
Which of the following belong to phylum arthropoda?
Bombyx and Apis
Laccifer and Anopheles
Locusta and Limulus
All of the above
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.
Which of the following animals are bilaterally symmetrical?
1 & 2
2 & 4
3 & 4
1 & 3
Match the terms/feature given in column I with their examples given in column II and select the correct match from the option given below.
| Column-I | Column-II |
|---|---|
| (Term/Feature) | (Examples) |
| A. Gregarious pest | i. Hirudinaria |
| B. Vector | ii. Planaria |
| C. Oviparous with | iii. Sepia indirect development |
| D. Metameres | iv. Aedes |
| E. High regeneration | v. Locust capacity |
A - i, B - ii, C - iii, D - iv, E - v
A - iii, B - v, C - ii, D - iv, E - i
A - iii, B - i, C - v, D - ii, E - iv
A - v, B - iv, C - iii, D - i, E - ii
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
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
Which of the following character is absent in all chordates?
Diaphragm
Coelom
Pharyngeal gill clefts
Dorsal nerve cord
Which of the following class is being correctly described by given statements (i - iv)?
(i) All living members of this class are ectoparasites on some fishes.
(ii) They have a sucking and circular mouth without jaws.
(iii) Circulation is of closed type.
(iv) They are marine but migrate for spawning to fresh water. After spawing, within a few days they die.
Cyclostomata
Chondrichthyes
Osteichthyes
Amphibia
Match the phylum given in column - I with the special features present in them given in column - II and choose the correct option.
| Column -I | Column- II |
|---|---|
| (Phylum) | (Special features present) |
| A. Porifera | I. Mammary glands |
| B. Mollusca | II. Cloaca |
| C. Ctenophora | III. Choanocytes |
| D. Amphibia | IV. Radula |
| E. Mammalia | V. Comb plates |
A III; B IV; C V; D II; E I
A IV; B III; C V; D II; E I
A III; B IV; C II; D V; E I
A III; B V; C IV; D II; E I
Match the phylum given in column - I with their example given in column - II and choose the correct option.
| Column -I | Column- II |
|---|---|
| (Phylum) | (Examples) |
| A. Echinodermata | I. Ascidia, Doliolum |
| B. Hemichordata | II. Asterias, Ophiura |
| C. Urochordata | III. Branchiostoma |
| D. Cephalochordata | IV. Balanoglossus, Saccoglossus |
A IV; B II; C I; D III
A II; B IV; C I; D III
A II; B IV; C III; D I
A II; B I; C IV; D III
Identify the figures and select the correct option
A - Pseudocoelomate; B - Coelomate, C-Acoelomate
A - Coelomate, B - Pseudocoelomate, C- Acoelomate
A - Coelomate; B- Acoelomate; C - Pseudocoelomate
A - Coelomate; B- Acoelomate; C-Eucoelomate