Name the type of fibres present in areolar tissues

1

(a)

Yellow elastic fibers and white collanhen fibres

A muscular fiber tapers at both the ends and does not show striations. Name the muscle fiber.

1

(a)

Smooth muscle fibre.

Write the origin and function of epithelial tissues

1

(a)

Origin Ectoderm , endoderm and mesoderm
Function Protection . secretion and absorption

Which connective tissue is presents under the skin ?

1

(a)

Dense areolar and adipose connective tissue

What is the shape of setae in earthworm ?

1

(a)

Setae in earthworm is S-shapes.

Name of the layers of the dermis of frog.

1

(a)

Layers of the dermis of frog are
(i) The upper stratum spongiosum
(ii) The lower startum compactum

How does the skin of the frog is suitable for respiration?

1

(a)

The skin in frog is richly supplied with blood and provides extensive surface for respiration.

How does earthworm spoll the playgrounds?

1

(a)

The earthworms make burrows in the soil of playground. This spoils the ground.

In earthworm, from which segment intestine starts and where it ends?

1

(a)

In earthworm, intestine starts from the 15th segment onwards and continues till the last segment.

Write the mode of locomotion in frog

1

(a)

Swimming, leaping and walking are the modes of locomotion in frog.

Why are blood , bone and cartilage callde connective tissues?

2

(a)

What are collateral glands and what is their function?

2

(a)

Why the scientists decalcify the bones?

2

(a)

Distinguish between dense regular and dense irregular connective tissue

2

(a)

Distinguish between cardiac muscles and striated muscles

2

(a)

Describe the features of exoskeleton of cockroach

3

(a)

Why is the body cavity of cockroach called haemocoel? Name the different layer of body wall in it.

3

(a)

Mention the similarities between Cardiac and skeletal muscles.

3

(a)

Difference between blood plasma and serum.

3

(a)

Describe the structure of adipose tissue briefly with the help of diagram.

3

(a)

Stratified epithelial cells have limited role in secreation . Justify their role in our skin 

5

(a)

Differences Between Blatta orientalis (oriental cockroach) and peripalnata americana (Aamerican cockroach).  

5

(a)

Distinguish between a male frog and female frog.

5

(a)