The air sacs in the lungs are comprised of
_____ cells.

1. simple squamous

2. simple columnar

3. simple cuboidal

4. transitional

An animal which contains three-chambered heart is ______________.

1. man

2. rabbit

3. fish

4. frog

Ventricle of frog contains:

(1) oxygenated blood

(2) deoxygenated blood

(3) no blood

(4) mixed blood

Assertion (A): Hibernation during winter and aestivation during summer is seen in frogs.

Reason (R): Frogs are poikilotherms.

(1) Both A and R are true and R is the correct explanation for A.

(2) Both A and R are true both R is not the correct explanation for A.

(3) A is true and R is false.

(4) A is false and R is true.

Blood is different from other connective tissue because

1. (i), (ii), (iii), (iv) 

2. (ii), (iv) only

3. (iv) only 

4. (ii) only

Areolar connective tissue contains
(i) Semi-fluid ground substance containing modified
polysaccharide.
(ii) Fibroblast cells.
(iii) Mast cells.
(iv) Macrophages.

1. (i), (ii), (iii), (iv) 

2. (ii), (iii), (iv) only

3. (i), (ii) only 

4. (i) only

Mark the incorrect statement regarding the Malpighian tubule in cockroach:

1. It is present at the junction of the midgut and hindgut.

2. It is lined by glandular and ciliated cells.

3. It absorbs uric acid from the hemolymph.

4. It is about 100-150 in number and is a thin yellow filamentous tubule.

Male reproductive system of cockroach consist of

Which of the following characteristics is not correct for squamous epithelium?

1. Made up of a single thin layer of flattened cells.
2. Cells with irregular boundaries.
3. Free surface contains microvilli.
4. Involved in a function like forming diffusion boundary.

Mark the incorrect statement regarding compound epithelium:

1. Made up of more than one layer of cells.

2. Vital role in secretion and absorption.

3. Provide protection against chemical and mechanical stress.

4. It covers the moist surface of the buccal cavity.