Tag: signs of life

Questions Related to signs of life

An example of living organism is/are

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

  1. Bacteria

  2. Plant roots

  3. Earthworm

  4. Both A and C

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Correct Option: D
Explanation:

The bacteria is a unicellular living organism which has been included in the group of prokaryotes. The earthworm is an example of segmented worm which belongs to the phylum Annelida. These are the living organisms which can perform the different biological processes like respiration, digestion, reproduction, etc. The plant roots cannot perform the functions without the other parts of the plants like leaves which produce food. 

Thus, the correct answer is option D. 

Which of the following helps in decomposition in soil and increases its nutrient content in the soil?

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

  1. Fungi

  2. Virus

  3. Protozoa

  4. None of the above

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Correct Option: A
Explanation:

Fungi feed by saprophytic mode of nutrition on dead and decaying plants and animals. In this, the fungi release enzymes on the dead organism and break down complex substances into simpler substances. They absorb the required amount of released nutrients and release the rest in the soil hence increase its nutrient content.

So, the correct answer is 'Fungi'.

The structural unit of a non-living thing is

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

  1. Electron

  2. Neuron

  3. Cell

  4. Molecule

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Correct Option: D
Explanation:

Electron is a stable sub-atomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids. 

Molecule is a group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction. 
Cell is the structural unit of a living being.  
A neuron is an electrically excitable cell that processes and transmits information through electrical and chemical signals. 

Find the odd one out.

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

  1. Cotton shirt

  2. Shoe

  3. Pen

  4. Paper

Show answer
Correct Option: C
Explanation:

The odd one out is the pen. The pen is generally made up of plastic. Plastic or polyvinyl chloride is a synthetic material. The material is non-biodegradable and cannot be degraded due to the activity of the microbes. The other examples are cotton shirt, shoe made up of leather and paper are biodegradable.

Thus, the correct answer is option C. 

Who among the following was a paleobotanist?

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

  1. P. Maheshwari

  2. S.R. Kashyap

  3. Birbal Sahni

  4. V. Puri

Show answer
Correct Option: C
Explanation:
These scientists were gems of Indian Botany who contributed and worked in below mentioned fields of plant research:
P. Maheshwari was an eminent plant embryologist and cytogenecist.
S.R. Kashyap was called as is called Father of Indian Bryology (the study of mosses and liverworts)
Birbal Sahni was Paleobotanist who dealt with is the study of fossil plants
V. Puri was renounced scientist in botany with contributions in the field of plant reproductive biology.

Since the question specificy paleobotany field  so the answer is "Birbal Sahni" Paleobotany is the study of fossil plants

The distinguishing property of crystal is 

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

  1. Growth is external

  2. Growth is internal

  3. Growth is discontinous

  4. None of the above

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Correct Option: A
Explanation:

The crystals are the non-living forms which show an external form of growth. The atoms form the nuclei and then the other molecules in the solution when cooled come together forming an aggregated structure. The new atoms and molecules are added from the outside and so, the growth in the non-living forms is always external. There are no cells which divide and show internal growth as in the living forms. 

Thus, the correct answer is option A. 

In the comparison of living things and non living things, which of the following statement is wrong ?

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

  1. Both are made of molecules

  2. Both are collection of many atoms

  3. Both respond to stimuli

  4. Both have mass and occupy space

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Correct Option: C
Explanation:
Both living and non-living things are made up of molecule and molecules age a group of aggregated atoms bound by a chemical bond and hence we can say that they both are a collection of atoms. Since atoms occupy space and have mass, the living things and non-living things also have mass and occupy space.
But responding to stimuli is an exceptionally distinguished character of living things only making it an opposite character of non-living things.
Hence option "respond to stimuli" is correct.

Both living things and nonliving things are made of 

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

  1. Cells

  2. Molecules

  3. Tissues

  4. Organs

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Correct Option: B
Explanation:
Every living being is composed of cells which act as the basic structural unit. these cells are in turn made up of more simpler molecules like amino acids, sugars. And all non- living things are also made up of repetitive sequence or mixing of one or more types of molecules.
Hence the correct option is B.

Correlated characters are those which occur 

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

  1. At random

  2. In groups or units

  3. In a particular portion of body

  4. In certain groups of organisms

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Correct Option: C

All of the living phenomena is absent in virus except

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

  1. Mutation

  2. Replication

  3. Respiration

  4. None of the above

Show answer
Correct Option: B
Explanation:

The genetic material in the living organisms has the ability to replicate and form more copies during the process of cellular division. This property of replication is shown by all the living organisms. The viruses are the non-living obligate parasites. They cannot perform any life functions like replication, respiration, digestion, reproduction, etc. 

Thus, the correct answer is option B.