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Test: Plant Growth & Development - 2


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25 Questions MCQ Test Biology Class 11 | Test: Plant Growth & Development - 2

Test: Plant Growth & Development - 2 for NEET 2022 is part of Biology Class 11 preparation. The Test: Plant Growth & Development - 2 questions and answers have been prepared according to the NEET exam syllabus.The Test: Plant Growth & Development - 2 MCQs are made for NEET 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Plant Growth & Development - 2 below.
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Test: Plant Growth & Development - 2 - Question 1

How many cells per hour does a single maize root apical meristem can give?

Detailed Solution for Test: Plant Growth & Development - 2 - Question 1

One single maize root apical meristem can give rise to more than 17,500 new cells per hour.

Test: Plant Growth & Development - 2 - Question 2

Higher plants possess specific areas which take part in the formation of new cells. These area are called

Detailed Solution for Test: Plant Growth & Development - 2 - Question 2

The tissues that have ability of cell division located in specific area are called meristem. They are located at stem and root tips, nodes of stem and intercalary region.

Test: Plant Growth & Development - 2 - Question 3

Abscissic acid is also known as

Detailed Solution for Test: Plant Growth & Development - 2 - Question 3

ABA stimulates the closure of stomata in the epidermis and increases the tolerance of plants to various kinds of stresses.Therefore, it is also called the stress hormone.

Test: Plant Growth & Development - 2 - Question 4

Antiauxin used in picking cotton bolls is

Detailed Solution for Test: Plant Growth & Development - 2 - Question 4

TIBA (2,3,5 Triidobenzoic acid) acts as antiauxin that inhibit root and shoot formation. TIBA is used as antiauxin in picking cotton bolls.

Test: Plant Growth & Development - 2 - Question 5

Type of cambium located between phloem and xylem is classified as

Test: Plant Growth & Development - 2 - Question 6

Permanent and irreversible increase in dry weight, size, and mass, volume of cell, organ or organism is called

Detailed Solution for Test: Plant Growth & Development - 2 - Question 6

Growth is the permanent and irreversible increase in dry weight, size, mass, volume of cells, organs or organism is called growth.

Test: Plant Growth & Development - 2 - Question 7

In rosette plants, bolting is due to

Detailed Solution for Test: Plant Growth & Development - 2 - Question 7

Gibberellins also promote bolting (internode elongation just prior to flowering) in beet, cabbages and many plants with rosette habit.

Test: Plant Growth & Development - 2 - Question 8

Phytochrome is sensitive to

Detailed Solution for Test: Plant Growth & Development - 2 - Question 8

Phytochromw is a photoreceptor used to detect light. It is sensitive to light in the red and far-red region of visible spectrum of light.

Test: Plant Growth & Development - 2 - Question 9

The undifferentiated mass of parenchymatous cells are called

Detailed Solution for Test: Plant Growth & Development - 2 - Question 9

The callus (a mass of undifferentiated cells) proliferated only if, in addition to auxins the nutrients medium was supplemented.

Test: Plant Growth & Development - 2 - Question 10

In dicotyledonous plants, girth of stem and root increase due to

Detailed Solution for Test: Plant Growth & Development - 2 - Question 10

In dicotyledonous plants, girth of stem and root increase due to secondary growth. Secondary growth occurs due to cambium formation in stem and root.

Test: Plant Growth & Development - 2 - Question 11

Which plant hormone is named anti-ageing hormone?

Detailed Solution for Test: Plant Growth & Development - 2 - Question 11

Cytokinin is named as anti-ageing hormone.

Test: Plant Growth & Development - 2 - Question 12

Which pair of enzyme promotes femaleness in flowers?

Detailed Solution for Test: Plant Growth & Development - 2 - Question 12

Auxin and ethylene are the plant hormone that promotes femaleness in flower.

Test: Plant Growth & Development - 2 - Question 13

The correct sequence leading to the growth curve

Detailed Solution for Test: Plant Growth & Development - 2 - Question 13

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.

Test: Plant Growth & Development - 2 - Question 14

Mathematically arithmetic growth is expressed as

Detailed Solution for Test: Plant Growth & Development - 2 - Question 14

Arithmetic growth is represented by L= L+ rt where Lt is final growth, L0 is initial size and rt is the rate of growth and time respectively.

Test: Plant Growth & Development - 2 - Question 15

In higher plants, the growing apical bud inhibits the growth of the lateral buds. This phenomenon is called

Detailed Solution for Test: Plant Growth & Development - 2 - Question 15

In most of the higher plants, the growing apical bud inhibits the growth ofthe lateral (axillary) buds, a phenomenon called apical dominance.

Test: Plant Growth & Development - 2 - Question 16

What would be expected to happen if a rotten fruit gets mixed with unripe fruits

Detailed Solution for Test: Plant Growth & Development - 2 - Question 16

Rotten fruit produce ethylene gas that hasten the ripening of unripe fruits. So, if a rotten fruit get mixed with unripe fruits the remaining unripe get ripen faster.

Test: Plant Growth & Development - 2 - Question 17

Auxins are generally produced in

Detailed Solution for Test: Plant Growth & Development - 2 - Question 17

The term ‘auxin’ is applied to the indole-3-acetic acid (IAA), and to other natural and synthetic compounds having certain growth regulating properties. They are generally produced by the growing apices of the stems and roots.

Test: Plant Growth & Development - 2 - Question 18

It is the testing of a biological activity like growth response of a substance by employing a living material like plant or plant part.

Detailed Solution for Test: Plant Growth & Development - 2 - Question 18

Testing of biological activity like growth response of a substance by employing a living material like plant or plant part is called bioassay. It is used to know the effect of substance on plant growth.

Test: Plant Growth & Development - 2 - Question 19

Growth regulator ethylene is used for

Detailed Solution for Test: Plant Growth & Development - 2 - Question 19

Ethylene is highly effective in fruit ripening. It enhances the respiration rate during ripening of the fruits.

Test: Plant Growth & Development - 2 - Question 20

If GA3 is applied to the rice seedlings, the plant will show

Detailed Solution for Test: Plant Growth & Development - 2 - Question 20

GA3 is a gibberellins that help in elongation of stem of the plant. If GA3 plant hormone is applied to the rice seedling the plant will show extra elongation of plant body.

Test: Plant Growth & Development - 2 - Question 21

Which hormone is responsible for dormancy?

Detailed Solution for Test: Plant Growth & Development - 2 - Question 21

Abscisic acid (ABA)was discovered for its role in regulating abscission and dormancy.

Test: Plant Growth & Development - 2 - Question 22

A farmer grows cucumber plants in his field. He wants to increase the number of female flowers in them. Which plant hormones can be applied to achieve this?

Detailed Solution for Test: Plant Growth & Development - 2 - Question 22

Ethylene promotes female flowers in cucumbers thereby increasing the yield.

Test: Plant Growth & Development - 2 - Question 23

Vernalisation takes place in response to

Detailed Solution for Test: Plant Growth & Development - 2 - Question 23

There are plants for which flowering is either quantitatively or qualitatively dependent on exposure to low temperature. This phenomenon is termedvernalisation.

Test: Plant Growth & Development - 2 - Question 24

Which growth is also called apparent growth?

Detailed Solution for Test: Plant Growth & Development - 2 - Question 24

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.

Test: Plant Growth & Development - 2 - Question 25

Auxin was isolated from tips of coloeptile of oat seedlings by

Detailed Solution for Test: Plant Growth & Development - 2 - Question 25

Auxin was isolated by F.W. Went from tips of coleoptiles of oat seedlings.

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