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BIOXI07: STRUCTURAL ORGANISATION IN ANIMALS

334584 In earthworm, pharyngeal nephridia are present in the segments

1

5^{t h}

,

6^{t h}

and

7^{t h}

2

4^{t h}

,

5^{t h}

and

6^{t h}

3 3 - last

4 15 - last

Explanation:

Pharyngeal nephridia are present as three paired tufts in the segments $4^{t h}$ , $5^{t h}$ and $6^{t h}$ . The ducts of $4^{t h}$ and $5^{t h}$ nephridia open into pharynx, while that of $6^{t h}$ nephridia open into buccal cavity.

BIOXI07: STRUCTURAL ORGANISATION IN ANIMALS

334585 Match the columns I and II with respect to earthworm
Column I
Column II
A
Buccal cavity
P
5-7 segments
B
Oesophagus
Q
1-3 segments
C
Gizzard
R
8-9 segments

1

A - R, B - P, C - Q

,

2

A - Q, B - R, C - P

,

3

A - P, B - R, C - Q

,

4

A - Q, B - P, C - R

BIOXI07: STRUCTURAL ORGANISATION IN ANIMALS

334586 The main role of calciferous glands of earthworm is _____and present in _____

1 Secreting mucus, stomach

2 Breaking food particles, intestine

3 Absorption of nutrients, intestine

4 Neutralising the humic acid, stomach

Explanation:

The main role of calciferous glands, present in the stomach in earthworms is to neutralise the humic acid present in humus. These glands secrete calcium and carbon dioxide. Calcium neutralises acidic food and ${CO}_{2}$ combines with calcium to form calcite which gets excreted out with the humus through the anus.

BIOXI07: STRUCTURAL ORGANISATION IN ANIMALS

334587 In earthworm, the location of blood glands coincide with

1 Typhlosole

2 Nerve ring

3 Pharyngeal nephridia

4 Gizzard

Explanation:

Blood glands are present on the $4^{t h}$ , $5^{t h}$ and $6^{t h}$ segments. They produce blood cells and haemoglobin which is dissolved in blood plasma. Also pharyngeal nephridia, present as three paired tufts in the $4^{t h}$ , $5^{t h}$ and $6^{t h}$ segments. Hence pharyngeal nephridia coincides with blood glands in earthworm.

BIOXI07: STRUCTURAL ORGANISATION IN ANIMALS

334584 In earthworm, pharyngeal nephridia are present in the segments

1

5^{t h}

,

6^{t h}

and

7^{t h}

2

4^{t h}

,

5^{t h}

and

6^{t h}

3 3 - last

4 15 - last

Explanation:

Pharyngeal nephridia are present as three paired tufts in the segments $4^{t h}$ , $5^{t h}$ and $6^{t h}$ . The ducts of $4^{t h}$ and $5^{t h}$ nephridia open into pharynx, while that of $6^{t h}$ nephridia open into buccal cavity.

BIOXI07: STRUCTURAL ORGANISATION IN ANIMALS

334585 Match the columns I and II with respect to earthworm
Column I
Column II
A
Buccal cavity
P
5-7 segments
B
Oesophagus
Q
1-3 segments
C
Gizzard
R
8-9 segments

1

A - R, B - P, C - Q

,

2

A - Q, B - R, C - P

,

3

A - P, B - R, C - Q

,

4

A - Q, B - P, C - R

BIOXI07: STRUCTURAL ORGANISATION IN ANIMALS

334586 The main role of calciferous glands of earthworm is _____and present in _____

1 Secreting mucus, stomach

2 Breaking food particles, intestine

3 Absorption of nutrients, intestine

4 Neutralising the humic acid, stomach

Explanation:

The main role of calciferous glands, present in the stomach in earthworms is to neutralise the humic acid present in humus. These glands secrete calcium and carbon dioxide. Calcium neutralises acidic food and ${CO}_{2}$ combines with calcium to form calcite which gets excreted out with the humus through the anus.

BIOXI07: STRUCTURAL ORGANISATION IN ANIMALS

334587 In earthworm, the location of blood glands coincide with

1 Typhlosole

2 Nerve ring

3 Pharyngeal nephridia

4 Gizzard

Explanation:

Blood glands are present on the $4^{t h}$ , $5^{t h}$ and $6^{t h}$ segments. They produce blood cells and haemoglobin which is dissolved in blood plasma. Also pharyngeal nephridia, present as three paired tufts in the $4^{t h}$ , $5^{t h}$ and $6^{t h}$ segments. Hence pharyngeal nephridia coincides with blood glands in earthworm.

BIOXI07: STRUCTURAL ORGANISATION IN ANIMALS

334584 In earthworm, pharyngeal nephridia are present in the segments

1

5^{t h}

,

6^{t h}

and

7^{t h}

2

4^{t h}

,

5^{t h}

and

6^{t h}

3 3 - last

4 15 - last

Explanation:

Pharyngeal nephridia are present as three paired tufts in the segments $4^{t h}$ , $5^{t h}$ and $6^{t h}$ . The ducts of $4^{t h}$ and $5^{t h}$ nephridia open into pharynx, while that of $6^{t h}$ nephridia open into buccal cavity.

BIOXI07: STRUCTURAL ORGANISATION IN ANIMALS

334585 Match the columns I and II with respect to earthworm
Column I
Column II
A
Buccal cavity
P
5-7 segments
B
Oesophagus
Q
1-3 segments
C
Gizzard
R
8-9 segments

1

A - R, B - P, C - Q

,

2

A - Q, B - R, C - P

,

3

A - P, B - R, C - Q

,

4

A - Q, B - P, C - R

BIOXI07: STRUCTURAL ORGANISATION IN ANIMALS

334586 The main role of calciferous glands of earthworm is _____and present in _____

1 Secreting mucus, stomach

2 Breaking food particles, intestine

3 Absorption of nutrients, intestine

4 Neutralising the humic acid, stomach

Explanation:

The main role of calciferous glands, present in the stomach in earthworms is to neutralise the humic acid present in humus. These glands secrete calcium and carbon dioxide. Calcium neutralises acidic food and ${CO}_{2}$ combines with calcium to form calcite which gets excreted out with the humus through the anus.

BIOXI07: STRUCTURAL ORGANISATION IN ANIMALS

334587 In earthworm, the location of blood glands coincide with

1 Typhlosole

2 Nerve ring

3 Pharyngeal nephridia

4 Gizzard

Explanation:

Blood glands are present on the $4^{t h}$ , $5^{t h}$ and $6^{t h}$ segments. They produce blood cells and haemoglobin which is dissolved in blood plasma. Also pharyngeal nephridia, present as three paired tufts in the $4^{t h}$ , $5^{t h}$ and $6^{t h}$ segments. Hence pharyngeal nephridia coincides with blood glands in earthworm.

BIOXI07: STRUCTURAL ORGANISATION IN ANIMALS

334584 In earthworm, pharyngeal nephridia are present in the segments

1

5^{t h}

,

6^{t h}

and

7^{t h}

2

4^{t h}

,

5^{t h}

and

6^{t h}

3 3 - last

4 15 - last

Explanation:

Pharyngeal nephridia are present as three paired tufts in the segments $4^{t h}$ , $5^{t h}$ and $6^{t h}$ . The ducts of $4^{t h}$ and $5^{t h}$ nephridia open into pharynx, while that of $6^{t h}$ nephridia open into buccal cavity.

BIOXI07: STRUCTURAL ORGANISATION IN ANIMALS

334585 Match the columns I and II with respect to earthworm
Column I
Column II
A
Buccal cavity
P
5-7 segments
B
Oesophagus
Q
1-3 segments
C
Gizzard
R
8-9 segments

1

A - R, B - P, C - Q

,

2

A - Q, B - R, C - P

,

3

A - P, B - R, C - Q

,

4

A - Q, B - P, C - R

BIOXI07: STRUCTURAL ORGANISATION IN ANIMALS

334586 The main role of calciferous glands of earthworm is _____and present in _____

1 Secreting mucus, stomach

2 Breaking food particles, intestine

3 Absorption of nutrients, intestine

4 Neutralising the humic acid, stomach

Explanation:

The main role of calciferous glands, present in the stomach in earthworms is to neutralise the humic acid present in humus. These glands secrete calcium and carbon dioxide. Calcium neutralises acidic food and ${CO}_{2}$ combines with calcium to form calcite which gets excreted out with the humus through the anus.

BIOXI07: STRUCTURAL ORGANISATION IN ANIMALS

334587 In earthworm, the location of blood glands coincide with

1 Typhlosole

2 Nerve ring

3 Pharyngeal nephridia

4 Gizzard

Explanation:

Blood glands are present on the $4^{t h}$ , $5^{t h}$ and $6^{t h}$ segments. They produce blood cells and haemoglobin which is dissolved in blood plasma. Also pharyngeal nephridia, present as three paired tufts in the $4^{t h}$ , $5^{t h}$ and $6^{t h}$ segments. Hence pharyngeal nephridia coincides with blood glands in earthworm.

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