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All questions of Support & Movement in Plants for JAMB Exam
The movement of plant parts in response to touch or contact is known as:- a)Gravitropism
- b)Nastic movement
- c)Thigmotropism
- d)Phototropism
Correct answer is option 'C'. Can you explain this answer?
The movement of plant parts in response to touch or contact is known as:
a)
Gravitropism
b)
Nastic movement
c)
Thigmotropism
d)
Phototropism
|
Deepak Iyer answered |
Thigmotropism is the growth or movement of a plant in response to touch or contact with a solid object. It helps plants to respond to physical stimuli in their environment.
Which of the following plant tissues is responsible for the transportation of sugars and organic nutrients?- a)Collenchyma
- b)Sclerenchyma
- c)Xylem
- d)Phloem
Correct answer is option 'D'. Can you explain this answer?
Which of the following plant tissues is responsible for the transportation of sugars and organic nutrients?
a)
Collenchyma
b)
Sclerenchyma
c)
Xylem
d)
Phloem
|
|
Deepak Iyer answered |
Phloem tissue is responsible for the transportation of sugars, amino acids, and other organic nutrients throughout the plant.
Which of the following plant tissues is involved in the movement of food from leaves to other parts of the plant?- a)Collenchyma
- b)Sclerenchyma
- c)Xylem
- d)Phloem
Correct answer is option 'D'. Can you explain this answer?
Which of the following plant tissues is involved in the movement of food from leaves to other parts of the plant?
a)
Collenchyma
b)
Sclerenchyma
c)
Xylem
d)
Phloem
|
|
Deepak Iyer answered |
Phloem tissue is responsible for the movement of food (sugars and organic nutrients) from leaves to other parts of the plant, including the roots, fruits, and seeds.
Xylem tissue is made up of:- a)Living cells
- b)Dead cells
- c)Both living and dead cells
- d)Xylem fibers only
Correct answer is option 'B'. Can you explain this answer?
Xylem tissue is made up of:
a)
Living cells
b)
Dead cells
c)
Both living and dead cells
d)
Xylem fibers only
|
|
Deepak Iyer answered |
Xylem tissue is composed of dead cells. These cells are empty, with no cytoplasm, and their main function is to transport water and minerals.
Which plant hormone is responsible for gravitropism?- a)Auxin
- b)Cytokinin
- c)Gibberellin
- d)Ethylene
Correct answer is option 'A'. Can you explain this answer?
Which plant hormone is responsible for gravitropism?
a)
Auxin
b)
Cytokinin
c)
Gibberellin
d)
Ethylene
|
|
Deepak Iyer answered |
Auxin plays a significant role in gravitropism. It accumulates on the lower side of the plant in response to gravity, promoting cell elongation and growth, which causes the roots to grow downward and shoots to grow upward.
Fibers in plants are primarily composed of:- a)Collenchyma cells
- b)Sclerenchyma cells
- c)Parenchyma cells
- d)Xylem vessels
Correct answer is option 'B'. Can you explain this answer?
Fibers in plants are primarily composed of:
a)
Collenchyma cells
b)
Sclerenchyma cells
c)
Parenchyma cells
d)
Xylem vessels
|
|
Deepak Iyer answered |
Plant fibers, such as those found in the stems of hemp and flax, are mainly composed of sclerenchyma cells. These cells provide strength and support.
The main function of collenchyma tissue in plants is to:- a)Provide mechanical support
- b)Conduct water and nutrients
- c)Store food reserves
- d)Facilitate gaseous exchange
Correct answer is option 'A'. Can you explain this answer?
The main function of collenchyma tissue in plants is to:
a)
Provide mechanical support
b)
Conduct water and nutrients
c)
Store food reserves
d)
Facilitate gaseous exchange
|
|
Deepak Iyer answered |
Collenchyma tissue provides mechanical support to young stems and leaves, enabling the plant to withstand mechanical stress.
Which of the following types of movement in plants occurs in response to changes in light intensity?- a)Photoperiodism
- b)Thigmotropism
- c)Gravitropism
- d)Phototropism
Correct answer is option 'D'. Can you explain this answer?
Which of the following types of movement in plants occurs in response to changes in light intensity?
a)
Photoperiodism
b)
Thigmotropism
c)
Gravitropism
d)
Phototropism
|
|
Deepak Iyer answered |
Phototropism is the growth or movement of a plant in response to light. It allows plants to orient themselves towards a light source for optimal photosynthesis.
Xylem tissue is responsible for:- a)Conducting water and dissolved minerals upward
- b)Conducting sugars and organic nutrients downward
- c)Providing mechanical support
- d)Facilitating gaseous exchange
Correct answer is option 'A'. Can you explain this answer?
Xylem tissue is responsible for:
a)
Conducting water and dissolved minerals upward
b)
Conducting sugars and organic nutrients downward
c)
Providing mechanical support
d)
Facilitating gaseous exchange
|
|
Deepak Iyer answered |
Xylem tissue transports water and dissolved minerals from the roots to the other parts of the plant, primarily in an upward direction.
The conducting elements of xylem tissue are:- a)Sieve tubes
- b)Tracheids and vessels
- c)Companion cells
- d)Xylem parenchyma
Correct answer is option 'B'. Can you explain this answer?
The conducting elements of xylem tissue are:
a)
Sieve tubes
b)
Tracheids and vessels
c)
Companion cells
d)
Xylem parenchyma
|
|
Deepak Iyer answered |
Xylem tissue contains tracheids and vessels, which are specialized cells responsible for conducting water and minerals throughout the plant.
How does auxin promote phototropism?- a)By inhibiting cell elongation on the shaded side
- b)By promoting cell elongation on the shaded side
- c)By inhibiting cell elongation on the illuminated side
- d)By promoting cell elongation on the illuminated side
Correct answer is option 'D'. Can you explain this answer?
How does auxin promote phototropism?
a)
By inhibiting cell elongation on the shaded side
b)
By promoting cell elongation on the shaded side
c)
By inhibiting cell elongation on the illuminated side
d)
By promoting cell elongation on the illuminated side
|
|
Deepak Iyer answered |
Auxin promotes cell elongation on the illuminated side of the plant, causing it to bend towards the light source. This differential growth results in phototropism.
Which of the following tropisms is primarily regulated by ethylene?- a)Phototropism
- b)Thigmotropism
- c)Hydrotropism
- d)Geotropism
Correct answer is option 'D'. Can you explain this answer?
Which of the following tropisms is primarily regulated by ethylene?
a)
Phototropism
b)
Thigmotropism
c)
Hydrotropism
d)
Geotropism
|
|
Deepak Iyer answered |
Geotropism, also known as gravitropism, is primarily regulated by auxin but is also influenced by ethylene. Ethylene plays a role in coordinating the overall response of the plant to gravity.
Which of the following is a characteristic of auxin in relation to tropism?- a)Promotes lateral growth
- b)Inhibits root growth
- c)Stimulates leaf abscission
- d)Enhances seed germination
Correct answer is option 'B'. Can you explain this answer?
Which of the following is a characteristic of auxin in relation to tropism?
a)
Promotes lateral growth
b)
Inhibits root growth
c)
Stimulates leaf abscission
d)
Enhances seed germination
|
|
Deepak Iyer answered |
Auxin inhibits the growth of roots, allowing shoots to grow more rapidly. This differential growth response helps in maintaining the proper orientation of the plant.
Which of the following plant tissues is responsible for the formation of bark?- a)Collenchyma
- b)Sclerenchyma
- c)Xylem
- d)Phloem
Correct answer is option 'D'. Can you explain this answer?
Which of the following plant tissues is responsible for the formation of bark?
a)
Collenchyma
b)
Sclerenchyma
c)
Xylem
d)
Phloem
|
|
Deepak Iyer answered |
The phloem tissue, along with the cork cambium, is responsible for the formation of the outer bark in plants.
The main function of sclerenchyma tissue in plants is to:- a)Transport water and nutrients
- b)Provide mechanical support
- c)Conduct photosynthesis
- d)Store food reserves
Correct answer is option 'B'. Can you explain this answer?
The main function of sclerenchyma tissue in plants is to:
a)
Transport water and nutrients
b)
Provide mechanical support
c)
Conduct photosynthesis
d)
Store food reserves
|
|
Deepak Iyer answered |
Sclerenchyma tissue consists of thick, rigid cell walls that provide strength and support to plant organs, such as stems and roots.
Which of the following types of movement in plants is characterized by the bending or curving of plant parts toward or away from a stimulus?- a)Tropism
- b)Nastic movement
- c)Phototropism
- d)Thigmotropism
Correct answer is option 'A'. Can you explain this answer?
Which of the following types of movement in plants is characterized by the bending or curving of plant parts toward or away from a stimulus?
a)
Tropism
b)
Nastic movement
c)
Phototropism
d)
Thigmotropism
|
|
Deepak Iyer answered |
Tropism refers to the growth or movement of a plant in response to a specific stimulus, such as light (phototropism) or touch (thigmotropism).
How does auxin contribute to thigmotropism?- a)By promoting root growth in response to touch
- b)By inhibiting leaf movement in response to touch
- c)By promoting cell elongation on the side opposite to touch
- d)By inhibiting cell elongation on the side opposite to touch
Correct answer is option 'C'. Can you explain this answer?
How does auxin contribute to thigmotropism?
a)
By promoting root growth in response to touch
b)
By inhibiting leaf movement in response to touch
c)
By promoting cell elongation on the side opposite to touch
d)
By inhibiting cell elongation on the side opposite to touch
|
|
Deepak Iyer answered |
Auxin promotes cell elongation on the side opposite to touch, allowing the plant to bend or curl away from the stimulus. This response is responsible for thigmotropism in plants.
Which type of movement in plants is responsible for the upward growth of shoots and downward growth of roots?- a)Hydrotropism
- b)Thigmotropism
- c)Phototropism
- d)Gravitropism
Correct answer is option 'D'. Can you explain this answer?
Which type of movement in plants is responsible for the upward growth of shoots and downward growth of roots?
a)
Hydrotropism
b)
Thigmotropism
c)
Phototropism
d)
Gravitropism
|
|
Deepak Iyer answered |
Gravitropism is the growth or movement of a plant in response to gravity. It enables the shoots to grow upward and the roots to grow downward, allowing the plant to establish a proper orientation.
Which of the following plant tissues provides mechanical support to young stems and leaves?- a)Collenchyma
- b)Sclerenchyma
- c)Xylem
- d)Phloem
Correct answer is option 'A'. Can you explain this answer?
Which of the following plant tissues provides mechanical support to young stems and leaves?
a)
Collenchyma
b)
Sclerenchyma
c)
Xylem
d)
Phloem
|
|
Deepak Iyer answered |
Collenchyma tissue provides flexible support to the growing parts of the plant, such as young stems and leaves.
Auxin is responsible for which type of tropism?- a)Phototropism
- b)Thigmotropism
- c)Hydrotropism
- d)Gravitropism
Correct answer is option 'A'. Can you explain this answer?
Auxin is responsible for which type of tropism?
a)
Phototropism
b)
Thigmotropism
c)
Hydrotropism
d)
Gravitropism
|
|
Deepak Iyer answered |
Auxin, a plant hormone, is primarily responsible for phototropism. It accumulates on the shaded side of the plant and promotes elongation, causing the plant to bend towards the light source.
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