Tag: biology : an introduction

Questions Related to biology : an introduction

Sum of physical and chemical processes by which living matter is produced and maintained is called as

biology biology : an introduction introduction to organization of life signs of life what is living?

  1. Respiration

  2. Growth

  3. Metabolism

  4. Reproduction

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Correct Option: C
Explanation:
The chemical processes that occur within a living organism in order to maintain life. There are two main types of metabolic processes namely catabolic and anabolic processes. The catabolic process involves breaking down of material for eg. proteins to amino acids. Whereas the anabolic process involves synthesizing materials for eg. sugars formation from carbon dioxide, water, and oxygen.
Hence correct answer is "metabolism".

The attributes of living organisms are

biology biology : an introduction introduction to organization of life signs of life what is living?

  1. Reproduction

  2. Self consciousness

  3. Movement

  4. All of the above

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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

biology biology : an introduction introduction to organization of life signs of life what is living?

  1. Number of legs

  2. Segmentation

  3. Colour of the body

  4. Both A and B

Show answer
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 

biology biology : an introduction introduction to organization of life signs of life what is living?

  1. 2

  2. 3

  3. 4

  4. 5

Show answer
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?

biology biology : an introduction introduction to organization of life signs of life what is living?

  1. Slowing of metabolism

  2. End of reproductive phase

  3. Juvenile stage

  4. Enlargement of thymus

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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

biology biology : an introduction introduction to organization of life signs of life what is living?

  1. Cells and organs

  2. Organs and organ system

  3. Cells and organ system

  4. None of the above

Show answer
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

biology biology : an introduction introduction to organization of life signs of life what is living?

  1. auxin

  2. gibberellin

  3. abscistic acid

  4. cytokinin

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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

biology biology : an introduction introduction to organization of life signs of life what is living?

  1. Happens from inside

  2. From outside

  3. Both A and B

  4. None of these

Show answer
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

biology biology : an introduction introduction to organization of life signs of life what is living?

  1. Water

  2. Salts

  3. Glucose

  4. Both A and B

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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

biology biology : an introduction introduction to organization of life signs of life what is living?

  1. W. B. Cannon

  2. Claude Bernard

  3. Linus Pauling

  4. None of the above

Show answer
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'.