Plant Growth and Development Test

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Plant Growth and Development Test - 69

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Weekly Quiz Competition

Question 1
1 / -0

Which one of the following classes of plant hormones is the substitute for low temperature treatment?

A
Auxins

B
Gibberellins

C
Cytokine

D
Ethylene
Question 2
1 / -0

Choose the correct answer from the alternatives given.
Plant growth depends on:

A
cell division

B
hormones

C
cell enlargement

D
all of these

Solution

Plant growth is characterized by cell division, hormones, and cell enlargement. These complete the growth of the plant.
So, the correct option is 'all of these'.
Question 3
1 / -0

Choose the correct answer from the alternatives given.
Apical dominance in plants is due to which of the following plant hormones:

A
ethylene

B
gibberellins

C
auxins

D
cytokinins

Solution

In most higher plants, the growing apical bud inhibits the growth of the lateral (axillary) buds, a phenomenon called apical dominance. Removal of shoot tips (decapitation) usually results in the growth of lateral buds. This is due to auxin.
So, the correct option is 'auxins'.
Question 4
1 / -0

Cytokinins helps to produce all except.

A
New leaves

B
Chloroplast in leaves

C
Lateral short growth and adventitious shoot foration

D
Rooting on cut stem

Solution

Phytohormone concerned in the cell division is called cytokinins. It is involved in the formation of chloroplast in leaves, new leaves formation, lateral shoot growth and adventitious shoot formation.
So, the correct option is ‘rooting on cut stem’.
Question 5
1 / -0

Choose the correct answer from the alternatives given.
Which of the following plant hormone is a gas?

A
Auxin

B
Cytokinin

C
Ethylene

D
Gibberellin

Solution

Ethylene is a small hydrocarbon gas. Ethylene is responsible for the changes in texture, softening, colour, and other processes involved in ripening.
So, the correct option is 'Ethylene'.
Question 6
1 / -0

A hormone delaying senescence is _____________.

A
Auxin

B
Cytokinin

C
Ethylene

D
Gibberellin
Question 7
1 / -0

I. Increase in mass II. Differentiation III. Increase in number of individuals. IV. Response to stimuli
Which two points are known as the twin characteristics of growth?

A
I and II

B
II and IV

C
II and III

D
I and III

Solution

There is an increase of mass in the living as well as non-living things, therefore the criteria of mass are not included in this.
Differentiation is referred to as the division of labor into a cell or tissue. This is also a criterion for living beings.
Increasing the number of individuals is not a criterion for living being because it is referred to as an entire population and not a single being.
Response to the external stimuli is and criteria which only living beings show and not the non-living beings.
So, the correct option is 'II and IV'
Question 8
1 / -0

Choose the correct answer from the alternatives given.
The classical experiment on growth was performed by:

A
Darwin and Boysen-Jensen

B
Garner and Allard

C
Yabuta and Sumiki

D
Skoog and Thiamann

Solution

The classical experiments in growth were performed by Boysen-Jensen and Darwin.
So, the correct option is 'Darwin and Boysen-Jensen'.
Question 9
1 / -0

Choose the correct answer from the alternatives given.
Which of the following is an effect of auxin?

A
Auxin production by seeds promotes the fruit growth

B
Trees sprayed with auxin will keep mature fruit from falling to the ground

C
Under the effect of gravity, auxin moves to the lower surface of roots and stems, causing roots to curve downward and stems to curve upward

D
All of the above
Question 10
1 / -0

Choose the correct answer from the alternatives given.
Cytokinins

A
are plant hormones that promote cell division

B
are used in combination with auxin to produce plants from undifferentiated callose tissue.

C
also work with oligosaccharins to effect tissue differentiation

D
all of the above.

Solution

It helps to produce new leaves, chloroplasts in leaves, lateral shoot growth and adventitious shoot formation. Cytokinins help overcome apical dominance. They promote nutrient mobilisation which helps in the delay of leaf senescence.
Natural cytokinins are synthesised in regions where rapid cell division occurs, for example, root apices, developing shoot buds, young fruits etc.
So, the correct option is 'all of the above'.

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Re-Attempt Weekly Quiz Competition

Plant Growth and Development Test - 69

Result

Plant Growth and Development Test - 69

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SHARING IS CARING

Question 1

Auxins

Gibberellins

Cytokine

Ethylene

Question 2

cell division

hormones

cell enlargement

all of these

Solution

Question 3

ethylene

gibberellins

auxins

cytokinins

Solution

Question 4

New leaves

Chloroplast in leaves

Lateral short growth and adventitious shoot foration

Rooting on cut stem

Solution

Question 5

Auxin

Cytokinin

Ethylene

Gibberellin

Solution

Question 6

Auxin

Cytokinin

Ethylene

Gibberellin

Question 7

I and II

II and IV

II and III

I and III

Solution

Question 8

Darwin and Boysen-Jensen

Garner and Allard

Yabuta and Sumiki

Skoog and Thiamann

Solution

Question 9

Auxin production by seeds promotes the fruit growth

Trees sprayed with auxin will keep mature fruit from falling to the ground

Under the effect of gravity, auxin moves to the lower surface of roots and stems, causing roots to curve downward and stems to curve upward

All of the above

Question 10

are plant hormones that promote cell division

are used in combination with auxin to produce plants from undifferentiated callose tissue.

also work with oligosaccharins to effect tissue differentiation

all of the above.

Solution

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