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Examine the figures A, B and C. In which one of the four options all the items A, B and C are correctly identified ? 
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A. A - Sycon, B - Euspongia, C - Spongilla

B. A - Euspongia, B - Spongilla, C - Sycon

C. A - Spongilla, B - Sycon, C - Euspongia

D. A - Euspongia, B - Sycon, C - Spongilla

Correct Answer :

A. A - Sycon, B - Euspongia, C - Spongilla


All the figures (A, B, and C) are the examples of porifera phylum. A, B and C are respectively Sycon, Euspongia (also called horny sponge) and Spongilla. They are primitive, sessile, aquatic, water dwelling filter feeders that pump water through their bodies to filter out particles of food matter.

Related Questions

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Polyp phase is absent in

A. Hydra

B. Aurelia

C. Physalia

D. Obelia

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4

Which of the following animals are bilaterally symmetrical?
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A. 1 & 2

B. 2 & 4

C. 3 & 4

D. 1 & 3

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4

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.

A. (i) and (ii)

B. (iii) and (iv)

C. (i), (ii) and (iii)

D. All of these

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4

Animals like annelids, arthropods, etc. where the body can be divided into identical left and right halves in only one plane, exhibit___________symmetry.

A. radial

B. bilateral

C. asymmetrical

D. non- symmetrical

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4

Which of the following statements is incorrect ?

A. Prawn has two pairs of antennae.

B. Nematocysts are characteristic feature of the phylum cnidaria.

C. Millipedes have two pairs of appendages in each segment of the body.

D. Animals that belong to phylum porifera are exclusively marine.

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4

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-IColumn-II
(Term/Feature)(Examples)
A. Gregarious pesti. Hirudinaria
B. Vectorii. Planaria
C. Oviparous withiii. Sepia indirect development
D. Metameresiv. Aedes
E. High regenerationv. Locust capacity

A. A - i, B - ii, C - iii, D - iv, E - v

B. A - iii, B - v, C - ii, D - iv, E - i

C. A - iii, B - i, C - v, D - ii, E - iv

D. A - v, B - iv, C - iii, D - i, E - ii

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A student brought home a strange animal which he found outside under a rock. It had moist skin, a complete digestive tract, a ventral nerve cord, and had gone through torsion. Identify the phylum of the animal.

A. Porifera

B. Annelida

C. Mollusca

D. Echinodermata

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In phylum arthropoda, excretion takes place through

A. nephridia

B. flame cells

C. malphigian tubules

D. gills

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4

Which of the following class is being described by the given statements (i - iv)?
(i) They are found in a variety of habitats- polar ice-caps, deserts, mountains, forests, grasslands and dark caves.
(ii) Most unique mammalian characteristic is the presence of mammary glands by which the young ones are nourished.
(iii) Heart is four-chambered.
(iv) Sexes are separate and fertilization is internal.

A. Reptilia

B. Aves

C. Mammalia

D. Amphibia

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4

Refer the figures A, B, C and D given below. Which of the following options shows the correct name of the animals shown by the figures A, B, C and D ? 
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A. A – Locust, B – Scorpion, C – Prawn, D – Pila

B. A – Locust, B – Prawn, C – Scorpion, D – Pila

C. A – Locust, B – Scorpion, C – Prawn, D – Snail

D. A – Butterfly, B – Scorpion, C – Prawn, D – Pila

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Which of the following belong to phylum arthropoda?

A. Bombyx and Apis

B. Laccifer and Anopheles

C. Locusta and Limulus

D. All of the above

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4

A common characteristic of all vertebrates without exception is

A. the division of body into head, neck, trunk and tail.

B. body covered with exoskeleton.

C. the possession of two pairs of functional appendages.

D. the presence of well- developed skull.

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4

Which of the following pairs of animals are similar to each other pertaining to the feature stated against them?

A. Pteropus and Ornithorhyncus - Viviparity

B. Garden lizard and crocodile - Three chambered heart

C. Ascaris and Ancylostoma - Metameric segmentation

D. Sea horse and flying fish - Cold blooded (poikilothermal)

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4

In ctenophora, the body bears _______ external rows of ciliated comb plates, which help in locomotion.

A. five

B. six

C. seven

D. eight

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Which one of the following groups of animals is correctly matched with its characteristic feature without even a single exception ?

A. Reptilia : possess 3 - chambered heart with one incompletely divided ventricle.

B. Chordata : Possess a mouth provided with an upper and lower jaw.

C. Chondrichthyes : Possess cartilaginous endoskeleton.

D. Mammalia : Give birth to young one.

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4

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.

A. Arthropoda

B. Annelida

C. Mollusca

D. Echinodermata

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4

The following statement are associated with the occurrence of notochord. Identify the incorrect statement.

A. It is present only in larval tail in ascidians.

B. It is replaced by a vertebral column in adult frog.

C. It is absent throughout the life in humans from the very beginning.

D. It is present throughout life in Amphioxus.

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The transition from aquatic to terrestrial lifestyles required many adaptations in the vertebrate lineage. Which of the following is not one of those adaptations ?

A. Switch from gill respiration to air-breathing lungs.

B. Improvements in water resistance of skin.

C. Alteration in mode of locomotion.

D. Development of feathers for insulation.

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__________ is responsible for maintaining the current of water in sponge.

A. Osculum

B. Porocytes

C. Spongocoel

D. Choanocytes

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The organisms attached to the substratum generally possess

A. one single opening to the digestive canal.

B. cilia on the surface to create water current.

C. radial symmetry.

D. asymmetrical body.

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Hemichordates have now been placed with the nonchordates, close to echinoderms, because true

A. notochord is absent.

B. pharyngeal gill-slits are lacking.

C. dorsal nerve cord is absent.

D. heart is lacking.

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Which of the following is a connecting link between invertebrates and non-invertebrates?

A. Sphenodon

B. Balanoglossus

C. Tadpole larva

D. Crocodile

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Which of the following is a chordate feature and not shared by the non-chordates ?

A. Metamerism

B. Axial organization

C. Bilateral symmetry

D. Pharyngeal gill slits

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Identify the animals shown in the given figures A, B and C from options given below. 
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A. A - Octopus; B -Asterias, C- Ophiura

B. A - Asterias; B - Ophiura, C- Octopus

C. A - Echinus; B - Octopus C - Ophiura

D. A - Ophiura; B - Echinus, C- Octopus

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Which of the following group of animals reproduces only by sexual means?

A. Ctenophora

B. Cnidaria

C. Porifera

D. Protozoa

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Which of the following feature is not correct regarding the figure given below? 
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A. It is an aquatic form.

B. Circulatory system is of open type.

C. It possesses parapodia for swimming.

D. Neural system consists of paired ganglia connected by lateral nerves to a double ventral nerve cord.

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4

Which of the following feature in birds indicates their reptilian ancestory ?

A. Eggs with a calcareous shell

B. Scales on their hind limbs

C. Four-chambered heart

D. Two special chambers-crop and gizzard in their digestive tract

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4

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).

A. Only (i)

B. Both (ii) and (iii)

C. (i), (iii) and (iv)

D. All of these

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The given figures of animals (A & B) are distinguished on the basis of symmetry. Select the correct option which shows the type of symmetry and its description against the animals.
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A. A : Biradial, organisms is divided into unequal halves by any plane through the central axis.

B. B: Bilateral, body is divided into equivalent right and left halves by only one plane.

C. A: Asymmetrical, organisms is not divided into equal halves by any plane through the central axis.

D. B: Radial, in which any plane passing through the central axis of the body divides the organism into two identical halves.

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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. 
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A. Ctenophora; Emission of light.

B. Porifera; Feeding, respiration and excretion.

C. Cnidarian; Anchorage, Defense and food capturing

D. Mollusca; Locomotion, transport of food and respiration.