Control and Coordination Test 28

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Control and Coordination Test 28

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Question 1
1 / -0

Power of regeneration is the lowest in:

A
Brain cells

B
Liver cells

C
Bone cells

D
Muscle cells

Solution

Brain cells remain in the beginning stage of the interphase of cell division for their life and never divide. Instead, they develop by forming new synapses with other neurons. They lack cellular machinery for cell division.
So, the correct answer is option A.
Question 2
1 / -0

Column I Column II
A. Auxin 1. Flowering
B. Cytokinins 2. Phototropism
C. Gibberellins 3. Cell division
D. Abscisic acid 4. Fruit ripening
E. Ethylene 5. Stomatal opening and closing
Match Column I with Column II and select the correct option from the codes given below:

A
A- 2, B- 3, C- 1, D- 5, E- 4

B
A- 2, B- 3, C- 5, D- 1,E- 4

C
A- 2, B- 5, C- 3, D- 4,E- 1

D
A- 5, B- 2, C- 3, D- 1,E- 4
Solution
- Auxin: Moves to the darker side of the plants, causing the cells on the dark side to divide and grow in more numbers than the cells on the brighter side. As a result, the plant stem tip curves toward the light. This plant movement is called phototropism. So, (A) goes with 2. 'Phototropism'.
- Cytokinins: Promote cell division (cytokinesis) in plant roots and shoots. So, (B) goes with 3. 'Cell division'.
- Gibberellins: Regulate various developmental processes, including flowering. So, (C) goes with 1. 'Flowering'.
- Abscisic acid: Causes the stomata to close when soil water is not enough to keep up with transpiration. So, (D) goes with 5. 'Stomatal opening and closing'.
- Ethylene: Responsible for accelerating the senescence (ageing) and abscission processes in plants. So, (E) goes with 4. 'Fruit ripening'.
Hence, the correct answer is option A.
Question 3
1 / -0

If the apical parts of the negative geotropic roots of mangrove plant are pasted with wax, which function of these roots will be affected?

A
Exchange of $$O_{2}$$ and $$CO_{2}$$

B
Water absorption

C
Fixation of plant

D
Photosynthesis

Solution

Negatively geotropic roots of mangrove plants serve the purpose of the exchange of oxygen and carbon dioxide. These are otherwise called as breathing roots or pneumatophores. Some lateral roots of mangroves become specialised as pneumatophores in saline mudflats, pneumatophores are lateral roots that grow upward (negative geotropism) for varying distances and function as the site of oxygen intake.
So, the correct answer is option A.
Question 4
1 / -0

Pigmented dendritic cells occur in

A
Stratum Malpighii

B
Stratum granulosum

C
Stratum corneum

D
Stratum lucidum

Solution

Epidermis is the outer part of skin, which is keratinised and composed of stratified squamous epithelium layers. In the structure of epidermis on the basis of shape of cells and cytoplasm, there are five stratum -
(1) Stratum Malpighii
(2) Stratum spinosum
(3) Stratum granulosum
(4) Stratum lucidum
(5) Stratum corneum
An innermost stratum of epidermis consisting of one layer of cells is called as stratum Malpighii. It is also called as stratum basale. Cells are cubical or columnar in shape. In this stratum two types of cells are present.
(i) Melanocytes - They are called pigmented dendritic cell. These cells are formed by modification of cell which lies at the junction of epidermis and dermis.
(ii) Keratinocytes - They get their nutrition from underlying connective tissue of dermis and divide to form another stratum of the epidermis.
Question 5
1 / -0

Mowing of a grass lawn facilitate better maintenance primarily owing to

A
Removal of apical dominance and promotion of lateral meristem

B
Wounding which stimulate rapid regeneration

C
Removal of apical dominance and promotion of intercalary meristems

D
Removal of apical dominance

Solution

Apical dominance observed in presence of auxin. This results in the growth of the central stem which is dominant and suppresses the growth of the lateral buds. The pruning of the tips or mowing of the grass is done where the tips are cut periodically. There is the removal of the apical dominance and the intercalary meristematic tissues grow. This allows the growth of the other branches.
Thus, the correct answer is option C.
Question 6
1 / -0

Deficiency of oxygen affects mainly the:

A
Brain

B
Skin

C
Kidney

D
Intestine

Solution

Brain cells are extremely sensitive to lack of oxygen. Some brain cells start dying in less than 5 minutes after their oxygen supply gets cut. As a result, brain hypoxia can rapidly cause severe brain damage or death.
So, the correct answer is option A.
Question 7
1 / -0

Cranium in man is made up of:

A
10 bones

B
12 bones

C
16 bones

D
8 bones

Solution

The group of bones that make up the head is called the skull which protects the brain. The skull can be divided into two groups namely, the cranium and the facial area. Total eight bones make up the cranium and six bones make up the facial area.
So, the correct answer is '8 bones.'
Question 8
1 / -0

An infant was having a sound sleep, he suddenly woke up with the noise of the drums outside. Which receptor in the infant is responsible for the detection of the sound?

A
Gustatory receptor

B
Auditory receptor

C
Olfactory receptor

D
None of the above

Solution

Auditory receptors are present in the ear. They are responsible for the detection of sound in the environment like various other receptors located in the sensory organs.
Therefore, the correct answer is option B.
Question 9
1 / -0

Name which part is often referred to as the emotional brain?

A
Cerebellum

B
Cerebrum

C
Central Nervous System

D
Limbic System
Solution
- The limbic system often referred to as the "emotional brain", is found buried within the cerebrum.
- Like the cerebellum, evolutionarily the structure is rather old. This system contains the thalamus, hypothalamus, amygdala, and hippocampus.
Therefore, the correct answer is option D.
Question 10
1 / -0

Different type of reflex arc is_____________

A
Somatic Reflex arc

B
Visceral Reflex arc

C
Both A and B

D
None of these

Solution

There are two types of reflex arcs namely, autonomic (visceral) reflex arc, affecting inner organs and somatic reflex arc, affecting muscles.
Therefore, the correct answer is option C.

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Column I	Column II
A. Auxin	1. Flowering
B. Cytokinins	2. Phototropism
C. Gibberellins	3. Cell division
D. Abscisic acid	4. Fruit ripening
E. Ethylene	5. Stomatal opening and closing

Control and Coordination Test 28

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Control and Coordination Test 28

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SHARING IS CARING

Question 1

Brain cells

Liver cells

Bone cells

Muscle cells

Solution

Question 2

A- 2, B- 3, C- 1, D- 5, E- 4

A- 2, B- 3, C- 5, D- 1,E- 4

A- 2, B- 5, C- 3, D- 4,E- 1

A- 5, B- 2, C- 3, D- 1,E- 4

Solution

Question 3

Exchange of $$O_{2}$$ and $$CO_{2}$$

Water absorption

Fixation of plant

Photosynthesis

Solution

Question 4

Stratum Malpighii

Stratum granulosum

Stratum corneum

Stratum lucidum

Solution

Question 5

Removal of apical dominance and promotion of lateral meristem

Wounding which stimulate rapid regeneration

Removal of apical dominance and promotion of intercalary meristems

Removal of apical dominance

Solution

Question 6

Brain

Skin

Kidney

Intestine

Solution

Question 7

10 bones

12 bones

16 bones

8 bones

Solution

Question 8

Gustatory receptor

Auditory receptor

Olfactory receptor

None of the above

Solution

Question 9

Cerebellum

Cerebrum

Central Nervous System

Limbic System

Solution

Question 10

Somatic Reflex arc

Visceral Reflex arc

Both A and B

None of these

Solution

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