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Living vs non living - class-XI

Description: Living vs non living
Number of Questions: 16
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Tags: biology diversity of life living and non living the habitat of living concept of life living organisms and their surroundings
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An irreversible or permanent increase in size, mass or volume of a cell, organ or organism is called as ________.

  1. growth

  2. differentiation

  3. dedifferentiation

  4. development


Correct Option: A
Explanation:

Growth is defined as a permanent or irreversible increase in thy weight, size, mass or volume of a cell, organ or organism.

Growth is

  1. Unidirectional backward

  2. Reversible

  3. Unidirectional forward

  4. None of the above


Correct Option: C
Explanation:

Growth is an irreversible process. It refers to a positive change in size, often over a long period of time. It can occur as a stage of maturation or a process toward fullness or fulfillment.

Plant growth is 

  1. Limited

  2. Unlimited

  3. Diffused

  4. Both (A) and (B)


Correct Option: B
Explanation:

Growth can be defined as an irreversible permanent increase in size of an organ or its parts or even of an individual cell. Generally, growth is accompanied by metabolic processes (both anabolic and catabolic), that occur at the expense of energy. Therefore, for example, expansion of a leaf is growth. Plant growth is unique because plants retain the capacity for unlimited growth throughout their life. This ability of the plants is due to the presence of meristems at certain locations in their body. The cells of such meristems have the capacity to divide and self-perpetuate. The product, however,soon loses the capacity to divide and such cells make up the plant body.This form of growth where in new cells are always being added to the plant body by the activity of the meristem is called the open form of growth.

........... is the irreversible increase in size, volume or weight of an organ or organism.

  1. Growth

  2. Reproduction

  3. Digestion

  4. All of the above


Correct Option: A
Explanation:
Growth is regarded as one of the most fundamental and conspicuous characteristics of a living being. What is growth? Growth can be defined as an irreversible permanent increase in size of an organ or its parts or even of an individual cell. Generally, growth is accompanied by metabolic processes (both anabolic and catabolic), that occur at the expense of energy. Therefore, for example, expansion of a leaf is growth.

So, the correct answer is 'Growth'.

Which one regulates plant growth?

  1. Commensalism

  2. Climate

  3. Hormones

  4. Both B and C


Correct Option: D
Explanation:

There are various plant hormones which regulate plant growth. Hormones like auxin, gibberellin, cytokinin promotes growth whereas hormones like ethylene and abscisic acid inhibits growth. Plant growth is also regulated by the climate or atmosphere. Various climatic factors like rainfall, light, temperature, humidity, etc regulates plant growth and development.

Thus, the correct answer is option D.

Growth is a

  1. Reversible increase in size

  2. Reversible increase in shape

  3. Irreversible increase in size

  4. None of the above


Correct Option: C
Explanation:

Growth is defined as the positive and irreversible change in size and mass over the period of time. It is shown by all living organisms. It occurs by an increase in cell size or number. In animals, growth is observed up to certain period of time only whereas plants shows continuous growth throughout the lifetime. 

Thus, the correct answer is option C.

Classical growth experiments were performed by 

  1. Darwin and Lamarck

  2. Lamarck and Boysen-Jensen

  3. Boysen-Jensen and Darwin

  4. De Vries and Paul


Correct Option: C
Explanation:

Classical growth experiments were conducted by Darwin, Boysen-Jensen paved path to refute ancient misconceptions on plant growth. Boysen and Jensen conducted some experiments, which provided more direct evidence that transmissible substance produced in the tip participates in the response. Charles Darwin explored the inductive nature and mechanistic connection between phototropism and gravitropism.

Auxanometer is used to detect

  1. Respiration

  2. Transpiration

  3. Plant movement

  4. Growth


Correct Option: D
Explanation:

Auxanometer are simple instruments that measure growth, as increase in axis length, which includes both increase in protoplasm mass as well as expansion, due to water absorption.

Classical experiments on growth were performed by ......................

  1. Lamarck and Boysen - Jennsen

  2. Boysen - Jennsen and Darwin

  3. Darwin and Lamarck

  4. De Vries and Paul


Correct Option: B
Explanation:

Classical experiments on growth were performed by Boysen - Jennsen and Darwin. The existence of first plant growth hormone came from the work of Darwin. They found that bending movement of coleoptile of canary grass was due to exposure of tip to unilateral light. Boysen - Jennsen found that the tip produces a chemical which was later named auxin. Darwin's findings on plants have been published as a book in the name of 'The power of movements in plants.

Distribution of growth in a root by marking it at equal intervals with Indian ink was originally studied by ........................

  1. Wellensick

  2. Strasburger

  3. Went

  4. Nitsch


Correct Option: B
Explanation:

Eduard Adolf Strasburger was a Polish - German professor who has one of the most famous botanists of the 19th century. He had contributed a lot towards the field of botany. He explained about the distribution of growth in a root by marking it at equal intervals with Indian ink.

Plant response to environment is mainly through

  1. Induction of dormancy

  2. Abscission of parts

  3. Synthesis of pigments

  4. Growth


Correct Option: D
Explanation:

Plants respond to their environment to ensure their survival. Plants response to environment is mainly through growth, either towards or away from stimuli. This type of response is called as tropism. It is brought about by hormones, which control plant growth and development.

Thus, the correct answer is option D.

Growth occurs when 

  1. Anabolism is higher than catabolism

  2. Catabolism is higher than anabolism

  3. Protoplasmic synthesis is more than apoplasmatic synthesis

  4. Apoplasmatic synthesis is more than protoplasmic synthesis


Correct Option: A
Explanation:

Growth occurs when the anabolic (Constructive activities) exceed the catabolic activities (destructive activities).

So the correct option is A.

Growth occurs when

  1. Anabolism is higher than catobolism

  2. Catabolism is higher than anabolism

  3. Protoplasmic synthesis is more than apoplasmatic synthesis

  4. Apoplasmatic synthesis is more than protoplasmic synthesis


Correct Option: A
Explanation:

The irreversible permanent increase in size, volume or weight of the body is called Growth. It is the cumulative effect of cell division, cell elongation and cell differentiation. During growth, in the cells, rate of metabolism is high. So, synthesis and breakdown of biomolecules takes place. In this synthesis of biomolecules is higher than breakdown of biomolecules. So the rate of anabolism is greater than catabolism.

So, correct option is ‘Anabolism is higher than catabolism’.

Substances synthesised during growth are

  1. Protoplasmic

  2. Apoplasmic

  3. Protoplasmic and apoplasmatic

  4. Nucleic acids


Correct Option: C
Explanation:

The irreversible permanent increase in size, volume or weight of the body is called Growth. During synthesis of protoplasmic and non protoplasmic substances takes place. Synthesis of the protoplasmic substances is called protoplasmic growth and synthesis of non protoplasmic  substances(cell wall) is called apoplasmic growth.

So, the correct option is ‘Protoplasmic and apoplasmic’

Generally growth and reproduction are

  1. Mutually inclusive events

  2. Mutually exclusive events

  3. Either a or b

  4. None


Correct Option: A
Explanation:

Increase in the size of an organ or body is called growth, whereas the formation of progeny from a parent is called reproduction. So in a living organism growth and reproduction simultaneously occur.

So, the correct answer is ‘Mutually inclusive events ’.

The growth of the root and stem in length with the help of apical meristem is called _________

  1. Primary growth

  2. Secondary growth

  3. Secondary and primary growth

  4. Reproductive growth


Correct Option: A
Explanation:

Primary growth is the increase in the length of root and shoot. It is the result of cell division of apical meristem. 


So, the correct option is 'Primary growth'.

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