Plant Growth and Development Test

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Plant Growth and Development Test - 1

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Weekly Quiz Competition

Question 1
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Which growth is also called apparent growth?

A
Reversible decrease in mass and volume

B
Reversible increase in mass and volume

C
Irreversible increase in mass or volume

D
Irreversible decrease in mass and volume

Solution

Explanation:

Irreversible increase in mass or volume of plant part is called apparent growth. Apparent growth is permanent and cannot be reversed back as it occurs due to increase in cell number.
Question 2
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Maximum growth occurs in

A
Leg phase

B
Exponential phase

C
Senescent phase

D
Stationary phase

Solution

Explanation:

In growth curve, maximum growth occurs in exponential phase of sigmoid curve. During this periods cells divide mitotically to increase length and girth of the plant.
Question 3
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The phenomenon of heterophyll is an example of

A
Senescence

B
Plasticity

C
Development

D
Redifferentiation

Solution

Explanation:

Plants follow different pathways in response to environment or phases of life to form different kinds of structures. This ability is called plasticity. This phenomenon of heterophylly is an example of plasticity.
Question 4
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All changes that an organism goes through during its life cycle is called as

A
Elongation

B
Maturation

C
Differentiation

D
Development

Solution

Explanation:

Development is a term that includes all changes that an organism goes through during its life cycle from germination of the seed to senescence.
Question 5
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Which of the following events are arranged in correct order?

A
Growth,differentiation,development

B
Differentiation,growth,development

C
Growth,development,differentiation

D
Development,differentiation,growth

Solution

Explanation:

Growth, differentiation and development are very closely related events in the life of a plant. Broadly, development is considered as the sum of growth and differentiation.
Question 6
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Measurement and the comparison of total growth per unit time is called

A
Arithmetic growth rate

B
Relative growth rate

C
Geometric growth rate

D
Absolute growth rate

Solution

Explanation:

Absolute growth rate refers to the measurement and comparison of total growth per unit time.

Thus, Absolute growth = Growth in given time period.

Relative growth rate refers to the growth of a particular system per unit time, expressed on a common basis
Question 7
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The differentiated cells have lost the capacity to divide can regain the capacity of division under certain conditions called as

A
Maturation

B
Dedifferentiation

C
Differentiation

D
Re differentiation

Solution

Explanation:

The living differentiated cells that have lost the capacity to divide can regain the capacity of division under certain conditions. This phenomenon is termed as dedifferentiation.
Question 8
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Auxins are generally produced in

A
xylem

B
leaves

C
root and shoot tips

D
Phloem

Solution

Explanation:

Auxins promote stem elongation, inhibit growth of lateral buds (maintains apical dominance). They are produced in the stem, buds, and root tips.

Example: Indole Acetic Acid (IA).

Auxin is a plant hormone produced in the stem tip that promotes cell elongation
Question 9
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The correct sequence leading to the growth curve

A
lag,stationary,log phases

B
lag, log, stationary phases

C
log,lag , stationary phases

D
stationary,log,lag phases

Solution

Explanation:

The initial growth is slow (lag phase), and it increases rapidly thereafter – at an exponential rate (log or exponential phase). Here, both the progeny cells following mitotic cell division retain the ability to divide and continue to do so. However, with limited nutrient supply, the growth slows down leading to a stationary phase.

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Re-Attempt Weekly Quiz Competition

Plant Growth and Development Test - 1

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Plant Growth and Development Test - 1

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SHARING IS CARING

Question 1

Reversible decrease in mass and volume

Reversible increase in mass and volume

Irreversible increase in mass or volume

Irreversible decrease in mass and volume

Solution

Question 2

Leg phase

Exponential phase

Senescent phase

Stationary phase

Solution

Question 3

Senescence

Plasticity

Development

Redifferentiation

Solution

Question 4

Elongation

Maturation

Differentiation

Development

Solution

Question 5

Growth,differentiation,development

Differentiation,growth,development

Growth,development,differentiation

Development,differentiation,growth

Solution

Question 6

Arithmetic growth rate

Relative growth rate

Geometric growth rate

Absolute growth rate

Solution

Question 7

Maturation

Dedifferentiation

Differentiation

Re differentiation

Solution

Question 8

xylem

leaves

root and shoot tips

Phloem

Solution

Question 9

lag,stationary,log phases

lag, log, stationary phases

log,lag , stationary phases

stationary,log,lag phases

Solution

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