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1. A complete digestive system is present in the members of all the following phyla of Animal Kingdom except:

I:	Platyhelminthes
II:	Mollusca
III:	Annelida

 

1.	Only I	2.	Only II
3.	Only II and III	4.	I, II, and III

2. Identify phyla A and B from the following set of features in the box given below:

	Features	Phylum A	Phylum B
a.	Presence of 3 germ layers	Absent	Present
b.	Hermaphroditism	Present	Present
c.	Regeneration	Present	Present in some members
d.	Digestive System	Absent	Incomplete

Select the correct option:

	A	B
1.	Platyhelminthes	Arthropoda
2.	Porifera	Platyhelminthes
3.	Cnidaria	Aschelminthes
4.	Ctenophora	Annelida

3. Assertion (A): Coelenterates have a tissue level of organization.
Reason (R): Cells performing the same function are arranged in tissues.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.

4.
Given below are two statements: 

Assertion (A):	Earthworm and tapeworm both exhibit true metamerism.
Reason (R):	Body of earthworm and tapeworm is divided into numerous segments since their embryonic life.

 

1.	Both (A) and (R) are true and (R) is the correct explanation of (A).
2.	Both (A) and (R) are true but (R) is not the correct explanation of (A).
3.	(A) is true but (R) is false.
4.	Both (A) and (R) are false.

 

5. Assertion (A) : Tapeworms absorb digested food by its body surface.
Reason (R) : Tapeworms possess digestive organs.
 
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.
 

6. Consider the given statements:

I:	Annelids are metamerically segmented animals with a true coelom.
II:	Arthropods are the most abundant group of animals characterised by the presence of jointed appendages.
III:	Molluscs have a soft body surrounded by an external calcareous shell.
IV:	Echinoderms possess a spiny skin.
V:	Hemichordates are fresh water animals.

The number of correct statements is:

1.	2	2.	3
3.	4	4.	5

7. In hemichordates:

1.	Circulatory system is a closed type
2.	Proboscis gland is a digestive gland that secretes a large number of hydrolytic enzymes
3.	Respiration takes place through the gills
4.	Sexes are not separate, fertilization is internal and development is direct

8. Consider the two statements:

Statement I:	All vertebrates are chordates but all chordates are not vertebrates.
Statement II:	Besides the basic chordate features, all vertebrates have at least a three-chambered heart and paired appendages.

 

1.	Both Statement I and Statement II are correct but Statement II does not explain Statement I.
2.	Statement I is correct and Statement II is incorrect.
3.	Both Statement I and Statement II are incorrect.
4.	Both Statement I and Statement II are correct and Statement II explains Statement I.

9. Consider the two statements:

Statement I:	Chondrichthyes lack the capacity to regulate their body temperature.
Statement II:	Osteichthyes have the capacity to regulate their body temperature.

1. Statement I is correct; Statement II is correct
2. Statement I is incorrect; Statement II is correct
3. Statement I is correct; Statement II is incorrect
4. Statement I is incorrect; Statement II is incorrect

10. The characteristics of class Reptilia are:
 

1.	Body covered with moist skin which is devoid of scales, the ear is represented by a tympanum, alimentary canal, urinary and reproductive tracts open into a common cloaca
2.	Freshwater animals with a bony endoskeleton and air bladder to regulate buoyancy
3.	Marine animals with cartilaginous endoskeletons, bodies covered with placoid scales
4.	Body covered with dry and cornified skin, scales over the body are epidermal, they do not have external ears

11. Select the incorrect match among the following with respect to the given organism and its general character.

1.	Spongilla	-	Marine, cellular level of organisation
2.	Fasciola	-	Flattened body, triploblastic, indirect development
3.	Ancylostoma	-	Dioecious, pseudocoelomate
4.	Bombyx	-	Jointed appendages, segmented and coelomate

12.

Regarding the cell shown in the given figure:

I: The name Cnidaria is derived from this cell
II: The stinging capsule present in the cell is called as nematode
III: These cells help cnidarians in anchorage, defence and in capturing the prey

1. While I and II are correct, III is incorrect
2. I, II and III are correct
3. Only II is incorrect
4. Only I is correct

13. Assertion (A): Platyhelminthes are also known as Flatworms.
Reason (R): Platyhelminthes have a dorsolaterally flattened body.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.

14. Read the following statements:

i.	Snakes lack urinary bladder
ii.	Air sacs in birds are helpful to lessen the body weight, keep the body warm, regulate body temperature and help in blood circulation
iii.	Bone marrow is abundantly present in birds
iv.	Devil fish belongs to the phylum Mollusca
v.	Sea urchin has mouth on lower side and anus on the upper side

How many of the above statements are incorrect?
1. One
2. Three
3. Two
4. Four

15.

Assertion (A):	Claspers are present in males of the class Chondrichthyes.
Reason (R):	Claspers assist copulation.

 

1.	Both (A) and (R) are True and (R) is the correct explanation of (A).
2.	Both (A) and (R) are True but (R) is not the correct explanation of (A).
3.	(A) is True but (R) is False.
4.	Both (A) and (R) are False.