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Introduction to organization of life - class-XI

Description: introduction to organization of life
Number of Questions: 38
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Tags: living and non living diversity of life organization of life biology biology : an introduction
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The attributes of living organisms are

  1. Reproduction

  2. Self consciousness

  3. Movement

  4. All of the above


Correct Option: D
Explanation:

Living organisms are blessed with the capability to reproduce and increase in number. The living cell has cellular machinery which helps in cell division. The self-consciousness is the ability to react and respond to a particular stimulus which is due to the well developed nervous system which helps to analyse the generated response. Movement is another unique potential of a living organism which is possible due to a fully developed skeletal and muscular system.

So, the correct answer is option D.

Mosquitoes, ant, dung beetle, butterfly, moth and cockroach all have same

  1. Number of legs

  2. Segmentation

  3. Colour of the body

  4. Both A and B


Correct Option: D
Explanation:

Mosquitoes, ant, dung beetle, butterfly, moth, and cockroach all belong to class Insecta of phylum Arthropoda. They have one pair of antennae, three pairs of legs, and three body regions i.e., head, thorax, and abdomen. Thus, the correct answer is option D.

How many (in number) of the following properties are the defining characteristics of living organisms?
Growth, reproduction, metabolism, cellular organisation, consciousness 

  1. 2

  2. 3

  3. 4

  4. 5


Correct Option: C
Explanation:

Growth, metabolism, reproduction, and consciousness are the properties of living organisms. Cellular organization is living is given by cells and in non-living by atoms and molecules so it's not a property just belonging to living. 

Which of the following can be considered as parameter of old age?

  1. Slowing of metabolism

  2. End of reproductive phase

  3. Juvenile stage

  4. Enlargement of thymus


Correct Option: A
Explanation:

  • Age is one of the most important factor for changes in energy metabolism. The basal metabolic rate decreases almost linearly with age. 
  • The volume of skeletal musculature decreases and the percentage of fat tissue increases with age. 
  • It is shown that a decrease in muscle mass relative to the total body may be wholly responsible for the age-related decrease in basal metabolic rate.

So, the correct answer is 'Slowing of metabolism'.

Tissue is the cellular organisational level intermediate between

  1. Cells and organs

  2. Organs and organ system

  3. Cells and organ system

  4. None of the above


Correct Option: A
Explanation:

  • Tissue is a cellular organizational level intermediate between cells and a complete organ. 
  • A tissue is an ensemble of similar cells from the same origin that together carry out a specific function. 
  • Organs are then formed by the functional grouping together of multiple tissues.

Thus, the correct answer is option A.

The substance that triggers the fall of mature leaves and fruits from plants is due to

  1. auxin

  2. gibberellin

  3. abscistic acid

  4. cytokinin


Correct Option: C
Explanation:

Abscistic acid is a plant hormone which promotes senescence of leaves and causes abscission of flowers and fruits.

In the living things, growth

  1. Happens from inside

  2. From outside

  3. Both A and B

  4. None of these


Correct Option: A
Explanation:

All living beings grow by the cell division and metabolic processing like respiration, nutrition etc. The living being is made up of cells hence their division happens inside the body and thus the growth happens from inside.

So the correct option is 'Happens from inside'.

Important inorganic molecules of living things are

  1. Water

  2. Salts

  3. Glucose

  4. Both A and B


Correct Option: D
Explanation:
Water is a major component of many of the body’s lubricating fluids and transport of materials throughout an organism. Water also protects cells and organs from physical trauma.
Many other salts are important in the body. For example, bile salts produced by the liver helps break apart dietary fats, and calcium phosphate salts form the mineral portion of teeth and bones. Salts also help in maintaining pH level of body along with water and other components.
Hence correct option is "Both A and B".

The idea of homeostasis was first presented by

  1. W. B. Cannon

  2. Claude Bernard

  3. Linus Pauling

  4. None of the above


Correct Option: B
Explanation:
Homeostasis is the state of steady internal conditions maintained by living things. The concept of the regulation of the internal environment was described by French physiologist Claude Bernard in 1865. He wrote, "The stability of the internal environment [the milieu intérieur] is the condition for the free and independent life. The word homeostasis was coined by W. B. Cannon in 1926.
Hence correct option is 'Claude Bernard'.

Which of the following organism has cellular level of organization?

  1. Bacteria

  2. Virus

  3. Animals

  4. Plants


Correct Option: A

The defining property of higher organisms is

  1. Height

  2. Weight

  3. Consciousness

  4. None of these


Correct Option: C
Explanation:

Option $C$ consciousness.

They have ability to sense and able to respond to stimuli biotic and abiotic stresses.

Which of the following statements is incorrect?

  1. There are 639 muscles in man's body

  2. There are 200 bones in human body

  3. There are 30 vertebrae in human body

  4. None of these


Correct Option: D

Which of following is common in living and non-living thing?

  1. Cell

  2. Tissue

  3. ATP

  4. Atoms


Correct Option: D
Explanation:

The living organisms are made up of the cells in which the atom forms the basis of all the structures in the cells like the proteins, lipids, fats, nucleic acids, etc. The living organisms are composed of cells, tissues, and ATP as the common source of energy. The non-living things are made up of the atoms which form the material. 

Thus, the correct answer is option D. 

Identify the attribute of living organisms.

  1. Tissue repair

  2. Irritability

  3. Both A and B

  4. Crystallization


Correct Option: C
Explanation:

The living organisms are composed of cells which form the tissues. The tissues when damaged are repaired and replaced by the new cells. Irritability is the ability of an organism to respond to the external stimulus. The organism exhibit movement on receiving the stimulus from the internal or the external environment. The most common example of irritability is shown by the Mimosa plant which folds the leaflets on stimulus with touch. 

Thus, the correct answer is option C. 

Homeostasis is achieved by .......... adaptation.

  1. Morphological

  2. Physiological

  3. Behavioural

  4. All of the above


Correct Option: D
Explanation:

  • Homoeostasis is the process that helps to maintain an equilibrium between the processes or the concentration of the fluid inside and outside the body.
  • The process of homeostasis can be achieved by morphological adaptation in the form of gills or through physiological adaptation by a change in temperature or through behavioral adaptation to survive in extreme conditions. 
Thus, the correct answer is option D. 

Reproduction is the ability of the living organisms to 

  1. Show response to stimulus

  2. Adjust to the change in the climate

  3. Produce similar of its kind

  4. Show growth and development


Correct Option: C
Explanation:

Reproduction is a process of producing offsprings from parents. It can be sexual, asexual or vegetative. Only sexual reproduction involves the fusion of gametes. It ensures continuity of a species by producing its own kind and also a transfer of genes in further generations.

So the correct option is 'Produce similar of its kind'.

Changes in structure and function of living beings is known as

  1. Adaptions

  2. Order

  3. Metabolism

  4. Development


Correct Option: D
Explanation:

Changes in structure and function of living beings is called as development. Development is important in an organism for in survival in the competition of nature. Development leads to adaptations that increase the chances of survival of an organism. 

So the correct option is D "development".

A living organism can be unexpectional differentiated from a non-living thing on the basis of its ability for

  1. Reproduction

  2. Growth and movement

  3. Responsiveness to touch

  4. Interaction with environment and progressive evolution.


Correct Option: A

Germination of seeds can be related to which of the following properties of the living organism?

  1. Reproduction

  2. Growth

  3. Response to stimulus

  4. Both B and C


Correct Option: D
Explanation:
Seed germination in response to diurnal fluctuations of temperature. Diurnal fluctuations in temperature may initiate or accelerate germination in certain flowering plants, and the effectiveness of the stimulus varies according to the amplitude of fluctuation and the presence or absence of light. These seeds after germinating brow into a new plant.
So the correct option is D "both B and C".

The release of oxygen by the plant during photosynthesis can be related to which of the following characteristics of the living organism?

  1. Absorption

  2. Movement

  3. Response to stimuli

  4. None of the above


Correct Option: D
Explanation:

Photosynthesis is a metabolic process done by plants to produce starch from carbon dioxide and water in presence of sunlight. During this process, residual oxygen atoms are turned to the oxygen molecules as a byproduct. So it's cannot be compared to absorption, movement, and response to stimuli.

So the correct option is D "none of the above".

The buds on the potato determine the which of the following ability of the living organism?

  1. Locomotion

  2. Growth

  3. Movement

  4. None of the above


Correct Option: B
Explanation:

Buds of potato are a type of vegetative reproductive part of the potato. These buds can individually be grown as a whole new plant with proper habitat and nutrition. 

So the correct option is B "growth".

Stomata can be related to which of the following activity

  1. Locomotion

  2. Excretion

  3. Movement

  4. Reproduction


Correct Option: B
Explanation:

Stomata are pores found on the surface ie. epidermis of the leaf. These are used for the exchange of gases and releasing water by the process of transpiration. In some plants, calcium salts are also excreted through these pores. So the correct option is B "excretion".

Which of the following is the characteristics of a living organism?

  1. Homeostasis

  2. Metabolism

  3. Adaptation

  4. All of the above


Correct Option: D
Explanation:
Homeostasis is the state of steady internal conditions maintained by living things. This dynamic state of equilibrium is the condition of optimal functioning for the organism and includes many variables, such as body temperature and fluid balance, being kept within certain pre-set limits.
Metabolism is the chemical processes that occur within a living organism in order to maintain life.
Adaptation is the process of change by which an organism or species becomes better suited to its environment.
An organism shows all of the given characters. 
So the correct option is D "all of the above".

Plants are considered as living organism because

  1. They are capable of movement.

  2. They are capable to locomote.

  3. They can breathe.

  4. Both A and C.


Correct Option: D
Explanation:

As a response to external stimuli, the plants show movement. For eg. plants tend to move towards the source of light, this is positive phototropism. It is prominently seen in sunflower. It also shows hydrotropism in the roots.

It is proved experimentally that plants can breathe. The basic principle of breathing includes the exchange of gases. It is seen that plants absorb carbon dioxide and release oxygen.
So the correct option is D "both A and C."

The lifespan of the dog is .......... years.

  1. 12 to 18

  2. 18 to 24

  3. 6 to 12

  4. 12 to 20


Correct Option: A
Explanation:
  • The ageing profile of dogs varies according to their adult size (often determined by their breed): smaller dogs often live over 15 to 16 years.
  • Whereas the medium and large sized dogs typically live for 10 to 13 years and some giant dog breeds such as mastiffs, often live only for 7 to 8 years.
  • So, the average lifespan for a dog is 12- 18 years.
  • So, the correct answer is option '12-18 years'.

Which of the following sets does not contain defining characteristics of living organisms?

  1. Growth and reproduction

  2. Metabolism and cellular level of organisation

  3. Response to stimuli and consciousness

  4. None of these


Correct Option: D
Explanation:

Characters like growth, reproduction, metabolism, responsiveness to stimuli are all defining characteristics of living organisms

Choose the correct answers from the alternatives given .
Which of the following is characteristics of living organisms?

  1. To be organised

  2. To respond

  3. To metabolise

  4. All of these


Correct Option: D
Explanation:
Living organisms show certain characteristics that make them different from non-living. 
  • Cellular organization - Each living organism has cells as a basic unit of life. Different organelles are organized to function as a unit inside the cell.
  • Ability to response - a living organism can sense and respond accordingly to external environmental conditions or stimuli. 
  • Metabolism - Different types of chemical reactions occur inside living organisms to maintain their living state. 
All of the given options are characteristics of living organisms. 
So the correct answer is "All of these".

Which of the following statements regarding the universal rules of biological nomenclature is incorrect?

  1. Biological names are either derived from Latin language or are Latinised

  2. The first word in a biological name represents the genus while the second component denotes the species

  3. Both the words in a biological name, when handwritten, are separately underlined, or printed in italics to indicate their Latin origin

  4. The specific epithet starts with a capital letter while the generic epithet starts with a small letter. It can be illustrated with the example of mangifera Indica


Correct Option: D
Explanation:

The generic epithet starts with a capital letter while the specific epithet starts with a small letter. It can be illustrated with the example of Mangifera indica.

Select the correct option for biological names.

  1. They are binomial

  2. They are descriptive

  3. They are universal

  4. All of these


Correct Option: D
Explanation:

The scientific names or biological names consist of two components- a generic name and a specific epithet. The name with two components are called binomial.
The scientific names are universal, being used all over the world irrespective of the language of the people. They are often descriptive, indicating some important characteristic of the organism.

Which of the following improves the capacity of an organism to survive in a particular environment?

  1. Growth

  2. Reproduction

  3. Repair

  4. Adaptation


Correct Option: D
Explanation:

Adaptation is the ability of an organism to modify or change according to the conditions of the environment. This ability allows the organism to change some of the structures permanently and evolve to form a more sustainable organism. This property improves the chances of survival of the organism in a particular area. 

Thus, the correct answer is option D. 

The process of taking in and giving out of the air is known as 

  1. Breathing

  2. Inhaling

  3. Exhaling

  4. None of the above


Correct Option: A
Explanation:
Breathing is process of taking in and giving out of the air for exchange of gases between the internal of body and the external environment. The taking in of air is called as inhalation and giving out of air is called exhalation. It is an important part of respiration and can be done by various organs like nose, skin, gills.
Hence the correct option is A "breathing".

The living and non-living things can be distinguished by 

  1. The living things cannot move

  2. The living things need food

  3. The living things cannot perform respiration

  4. Both B and C


Correct Option: B
Explanation:
The living things require energy for all basic activities like respiration, movement, reproduction. This energy is obtained by break down of food, therefore, living things need food. But non-living things do not require such energy thus they do not need food.
Hence correct option is B "The living things need food".

The removal of the wastes from the body is known as 

  1. Excretion

  2. Digestion

  3. Extraction

  4. Ingestion


Correct Option: A
Explanation:

Excretion is process by which nitrogenous waste is thrown out of body. It is done to avoid toxicity in body by the waste, maintain pH and water level. It's done by various organs like kidney in human, nephridia in worms, etc.

So, the correct option is 'Excretion'.

The change that takes place in the body of the organism when a stimulus is provided is known as 

  1. Adaptation

  2. Response

  3. Growth

  4. None of the above


Correct Option: B
Explanation:
An adaptation is a feature that helps an organism, such as a plant or animal, survive in its environment.
A response can be defined as any change in the behavior of a living organism that results when an external or internal stimulus is provided. Growth is an irreversible, permanent increase in the size of an organ or its parts or even of an individual cell.
So, the answer is B.

It is much easier for a small animal to run uphill than for a large animal because

  1. the efficiency of muscles in large animals is less than in small animals

  2. it is easier to carry small body weight

  3. smaller animals have a higher metabolic rate

  4. small animals have a lower $O _2$ requirement.


Correct Option: C
Explanation:
Metabolic rate is directly proportional to the size of an animal. Larger the animal, lower is the metabolic rate.
Small animals can run uphill than a large animal because of their fast metabolic rate.
So, the correct option is 'smaller animals have a higher metabolic rate'
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