Structural Organisation in Animals Test

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Structural Organisation in Animals Test - 68

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Weekly Quiz Competition

Question 1
1 / -0

Cardiomyocytes are connected by

A
Plasmodesmata

B
Flagella

C
Intercalated discs

D
None of the above

Solution

There are two types of cells within the heart: the cardiomyocytes and the cardiac pacemaker cells. Both cardiac pacemaker cells and cardiomyocytes are connected by porous junctions called intercalated discs which permit sodium, potassium, and calcium to easily diffuse from cell to cell. This makes it easier for depolarization and repolarization in the myocardium. Because of these junctions, the heart muscle is able to act as a single coordinated unit.
So, the correct answer is 'Intercalated discs'.
Question 2
1 / -0

Which of the following doesn't contribute to prevent loss of water from the body of cockroach?

A
Chitinous exoskeleton

B
Uric acid excretion

C
Biting and chewing type of mouth parts

D
Both A and B
Solution
- Chitinous exoskeleton prevents the delicate tissues of cockroach from becoming dry. In short, it acts as a watertight barrier against dehydration, which is crucial for their survival.
- The excretion of uric acid requires the least amount of water for it's elimination. Thus, it aids in water conservation.
- Biting and chewing type mouth parts of cockroach help to enhance their feeding efficiency and do not help in water conservation.
So, the correct option is 'Biting and chewing type of mouth parts'.
Question 3
1 / -0

Adipose tissue prevents:

A
Loss of salts from the body

B
Loss of essential body fluids

C
Loss of heat from the body

D
Entry of harmful micro-organisms from the environment

Solution

There is a fatty layer under the skin which is known as the subcutaneous tissue layer. It is made up of adipose tissue and it acts as a barrier that stops the heat from escaping the body and that helps in keeping us warm.
So, the correct option is 'Loss of heat from the body.'
Question 4
1 / -0

In an organ system, many ........... work together.

A
Cells

B
Tissues

C
Organs

D
Organisms

Solution

Cells constitute the basic structure of tissue, different types of tissue join together to form organs, and many organs represent the organ system within the body. All the tissues and organs within the body work together to carry out the function required for the survival of the organism. Thus, in an organ system, many organs work together to perform a joint function.
So, the correct answer is 'Organs'.
Question 5
1 / -0

Heart of a cockroach has .......... compartments.

A
2

B
3

C
4

D
13

Solution

Heart of cockroach is tube shaped and divided into 13 compartments or chambers.
So, the correct answer is '13'.
Question 6
1 / -0

The clitellum is a distinct part in the body of earthworm,it is found in?

A
Segments 13 - 14- 15

B
Segments 14 - 15 - 16

C
Segments 12 - 13 - 14

D
Segments 15 - 16 - 17

Solution

The clitellum is a thick glandular and nonsegmented section of the body wall in the form of a prominent circular band, present in segments 14-15-16 in the earthworm. Clitellum secretes mucous and albumin which helps in the formation of the cocoon and is used for fertilization of eggs.
So,the correct answer is 'Segments 14-15-16' .
Question 7
1 / -0

The following are associated with Pheretima. Match them.
Column I Column II
A. Yellow cells i. Primardial germ cells
B. Oval sphinctered pores ii. Totipotent
C. Basal cells iii. Deamination
D. Parietal layer iv. The septum between $$14/15 $$

A
A-iii, B-iv, C-ii, D-i

B
A-iii, B-ii, C-iv, D-i

C
A-iii, B-i, C-ii, D-iv

D
A-iv, B-i, C-ii, D-iii

Solution

A. Yellow cells are also called chloragogen cells. These cells store glycogen and also involved in deamination of amino acids.
B. The segments of Pheretima have various perforations. The sphinctered oval shaped pores are present in the septum between 15$$^{th}$$ and 15$$^{th}$$ segments.
C. Basal cells are the small and undifferentiated cells present on the inner side of the epidermis. These cells are totipotent and have the ability to regenerate a tissue or organ. Hence they are also called replacing cells.
D. Parietal layer forms the outer boundary of coelom in Pheretima. The parietal layer is formed by the primordial germ cells.
So, the correct answer is 'A-iii, B-iv, C-ii, D-i'.
Question 8
1 / -0

Which of the following segments has photoreceptors in cockroach?

A
Head

B
Abdomen

C
Thorax

D
None of the above

Solution

The photoreceptor is the receptor for light i.e., eye that is situated on the head. It is found on the epidermis of the integument in the cockroach. The eyes of cockroach are compound in nature. The visual units are known as ommatidia.
So, the correct answer is 'Head'.
Question 9
1 / -0

Which of the following statements is true about muscle?

A
Skeletal muscle is an involuntary muscle.

B
Smooth muscle is striated.

C
Cardiac muscle is a voluntary muscle.

D
None of the above

Solution

Skeletal muscle is a voluntary muscle whereas, cardiac muscle is an involuntary muscle. Smooth muscles do not possess alternate dark and light bands. Hence. smooth muscles are unstriated.
None of the statements are correct.
Thus, the correct answer is option D.
Question 10
1 / -0

In frogs, notochord is present in the form of

A
Nucleous pulposus

B
Intervertebral disc

C
Vertebral

D
Segment

Solution

Members of sub-phylum Vertebrata possess notochord during embryonic period and this notochord is later replaced by cartilaginous or bony vertebral column in the adult phase. Since amphibians are members of Sub-phylum vertebrata thus they have notochord in form of vertebral column.
So, the correct answer is 'Vertebral'.

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Re-Attempt Weekly Quiz Competition

	Column I		Column II
A.	Yellow cells	i.	Primardial germ cells
B.	Oval sphinctered pores	ii.	Totipotent
C.	Basal cells	iii.	Deamination
D.	Parietal layer	iv.	The septum between $$14/15 $$

Structural Organisation in Animals Test - 68

Result

Structural Organisation in Animals Test - 68

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SHARING IS CARING

Question 1

Plasmodesmata

Flagella

Intercalated discs

None of the above

Solution

Question 2

Chitinous exoskeleton

Uric acid excretion

Biting and chewing type of mouth parts

Both A and B

Solution

Question 3

Loss of salts from the body

Loss of essential body fluids

Loss of heat from the body

Entry of harmful micro-organisms from the environment

Solution

Question 4

Cells

Tissues

Organs

Organisms

Solution

Question 5

2

3

4

13

Solution

Question 6

Segments 13 - 14- 15

Segments 14 - 15 - 16

Segments 12 - 13 - 14

Segments 15 - 16 - 17

Solution

Question 7

A-iii, B-iv, C-ii, D-i

A-iii, B-ii, C-iv, D-i

A-iii, B-i, C-ii, D-iv

A-iv, B-i, C-ii, D-iii

Solution

Question 8

Head

Abdomen

Thorax

None of the above

Solution

Question 9

Skeletal muscle is an involuntary muscle.

Smooth muscle is striated.

Cardiac muscle is a voluntary muscle.

None of the above

Solution

Question 10

Nucleous pulposus

Intervertebral disc

Vertebral

Segment

Solution

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