Tag: living world and classification

Questions Related to living world and classification

Read the following statements and select the correct option.


Statement 1: Reproduction cannot be considered as a defining property of living organisms.
Statement 2: There are many living organisms which do not reproduce, e.g., mules, worker bees, etc.

zoology living and non living characteristics of life attributes of living organisms signs of life biology : an introduction living world and classification

  1. Both statements 1 and 2 are correct.

  2. Statement 1 is correct but statement 2 is incorrect.

  3. Statement 1 is incorrect but statement 2 is correct.

  4. Both statements 1 and 2 are incorrect.

Show answer
Correct Option: A
Explanation:

A- Reproduction cannot be considered an inclusive defining characteristics of living organisms of the following. In single celled organism growth and reproduction are synonym as increased in no. of cells is considered as growth as well reproduction. Organisms like mule and liger can't reproduce fertile offspring.

B- Growth is the increase in the number or mass of cells. However, reproduction in case of unicellular organisms is also achieved by an increase in cell number. Thus, growth and reproduction are synonymous and cannot be the distinguishing factor. Moreover, there are many organisms such as worker bees, mules, infertile human couples that cannot reproduce. 
So, the correct option is ' Both statements 1 and 2 are correct'.

Apart from our earth which other planet of solar system has possibilities of life?

zoology living and non living characteristics of life attributes of living organisms signs of life biology : an introduction living world and classification

  1. Mercury

  2. Jupiter

  3. Venus

  4. Mars

Show answer
Correct Option: D
Explanation:

Planet Mars is believed to contain three most essential requirement of life i.e., Chemical building blocks abundance , source of water and a source of energy as volcanoes . Thus, it is expected that apart from earth Mars is the planet which can cater life.

The high boiling point of water is advantageous to living organisms because

zoology living and non living characteristics of life attributes of living organisms signs of life biology : an introduction living world and classification

  1. The environment seldom reaches the boiling point of water

  2. Organisms can easily boil off enough water to keep themselves cool

  3. It allows organisms to spread heat evenly throughout their bodies

  4. Organisms can absorb a great deal of heat before they reach the boiling point from organisms and population

Show answer
Correct Option: D
Explanation:

The high boiling point of water is advantageous to living organisms because organisms can absorb a great deal of heat before they reach the boiling point from organisms and population. Thus the organisms will not be affected by the high temperature because water can absorb the heat and maintain its homogeneity by uniformly dissipating it.


So the correct option is 'Organisms can absorb a great deal of heat before they reach the boiling point from organisms and population'.



Among the following choose the properties shown by the living organism exclusively.


I. Growth
II. Increase in mass
III. Self-replication ability
IV. Response to touch stimuli

zoology living and non living characteristics of life attributes of living organisms signs of life biology : an introduction living world and classification

  1. I and II

  2. I, II and III

  3. III and IV

  4. I, II, III and IV

Show answer
Correct Option: C
Explanation:
self replicating ability, also known reproduction and responding to or reacting to changes in the internal or external environment is called responsiveness to stimulus are both properties exclusive to living organisms
So, the correct answer is 'III and IV'

Phylloclade is found in:

zoology living and non living characteristics of life attributes of living organisms signs of life biology : an introduction living world and classification

  1. Opuntia

  2. Cactus

  3. Acacia

  4. Ruscus

Show answer
Correct Option: A
Explanation:
  • The Phylloclade is stem modified to the functioning of leaves in xerophytic plants.
  • It is flattened as Opuntia, they contain chlorophyll and carry out the photosynthesis process.

Select the appropriate statement


Most common constitutes of organic compounds found in organism are

zoology living and non living characteristics of life attributes of living organisms signs of life biology : an introduction living world and classification

  1. C , H, O, P

  2. C , H, O

  3. C, H, N ,P

  4. C , H, O, N, P

Show answer
Correct Option: A
Explanation:
  • Organic compounds are macromolecules or compounds associated with life processes such as carbohydrates, proteins, lipids, nucleic acids.
  • The main constituents of this organic compond are Carbon, hydrogen, oxygen and phosphorous.
  • In carbohydrates, the main components are carbon, hydrogen and oxygen atoms.
  • Eg- Glucose- is a single-unit carbohydrate or monosaccharide with six carbon atoms, 12 hydrogen atoms, and six oxygen atoms.
  • In proteins,  the main components are carbon, hydrogen, oxygen, and nitrogen atoms.
  • Eg- Any amino acid has a basic amino group (−NH2), an acidic carboxyl group (−COOH), and an organic R group (or side chain).
  • Nucleic acids contains carbon atoms, phosphate and nitrogenous base.

The most important characteristics of living organisms is

zoology living and non living characteristics of life attributes of living organisms signs of life biology : an introduction living world and classification

  1. Multiplication

  2. Movement

  3. Growth

  4. Protoplasm

Show answer
Correct Option: D
Explanation:

The most important characteristic defining an organism as living is the presence of protoplasm in it's cells. While the other three options which are multiplication, movement and growth can not define living to the full extent. As plants are immobile yet they are living. The external growth of mountains, boulders, and sand is observed. Mules, sterile worker bees and sterile couples can not multiply but they are living organisms.

So, an important characteristic of living organisms is 'Protoplasm'.

The property which is present universally in living organism is 

zoology living and non living characteristics of life attributes of living organisms signs of life biology : an introduction living world and classification

  1. Reproduction

  2. Metabolism

  3. Cellular organisation

  4. Growth

Show answer
Correct Option: B

Which characteristic distinguishes living organism unexceptionally from the non-living?

zoology living and non living characteristics of life attributes of living organisms signs of life biology : an introduction living world and classification

  1. Metabolism

  2. Reproduction

  3. Movement

  4. Interaction with the environment

Show answer
Correct Option: A
Explanation:

  1. Metabolism occurs 'unexceptionally in all living organisms' and this is a defining feature of living beings. 
  2. Reproduction is absent in sterile or infertile living beings.
  3. Organisms like the majority of sponges and plants do not move, but they're still living.
  4. Patients in a coma do not interact with the environment, yet all the metabolic processes occur thus they are living.
So, the correct option is "Metabolism",

How many of the following organisms have a lifespan of more than 20 years?

Elephant, Parrot, Dog, Rose, Crow, Banyan tree, Crocodile

zoology living and non living characteristics of life attributes of living organisms signs of life biology : an introduction living world and classification

  1. 3

  2. 4

  3. 5

  4. 6

Show answer
Correct Option: C
Explanation:

Life span : The period from birth to the natural death of an organism. Life span can never be correlate with the size of animals. Life span of some animals are given below ;

  • Elephant - 60-90 years
  • Parrot - 100 - 140 years
  • Dog - 20 - 30 years
  • Rose - 5 - 7 years
  • Crow - 15 years
  • Banyan tree - 200 years
  • Crocodile - 60 years
  • So the correct answer is " 5 ".