Tag: the living world

Questions Related to the living world

.......... are devices consisting of a series of contrasting or contradictory statements or propositions requiring the identifier to make comparisons and decisions.

biology the living world botanical gardens, zoological parks and zoological museums museums and zoos tools of taxonomy

  1. Herbarium

  2. Taxonomic keys

  3. Monograph

  4. None of the above

Show answer
Correct Option: B
Explanation:

Taxonomic keys are written characteristic information that helps a person to identify an unknown species of living organism. The taxonomic key provides a certain structure on the basis of which the user can sort out the taxonomic position of the unknown species.

Taxonomic keys are devices consisting of a series of contrasting or contradictory statements or propositions requiring the identifier to make comparisons and decisions.

Refer to the given dichotomous key and select the correct option regarding cell organelles L - O.

I.   (a) Cell organelle bounded by double-membrane - Go to II
     (b) Cell organelle bounded by a single membrane - Go to III 
II.  (a) Directs cell growth and controls its activities - $\boxed{L}$
     (b) Provides colour to flowers and fruits -  $\boxed{M}$
III. (a) Removes dead cells and digests foreign material - $\boxed{N}$
     (b) Carries out some oxidative reactions in a cell -.$\boxed{O}$

biology the living world botanical gardens, zoological parks and zoological museums museums and zoos tools of taxonomy

  1. L could be Mitochondria whereas M could be Chloroplast.

  2. M could be Chromoplast whereas N could be Golgi apparatus.

  3. L could be Nucleus whereas O could be Peroxisome.

  4. M could be Leucoplast whereas N could be Vacuole.

Show answer
Correct Option: C

The headquarters of IUCN are at

zoology the living world history of classification of organisms introduction to classification of living organisms living world and classification

  1. North America

  2. Rome

  3. South America

  4. Switzerland

Show answer
Correct Option: D
Explanation:
IUCN stands for International Union for the Conservation of Nature and Natural Resources is the world's oldest global environmental organization to protect plants, animals and habitats having its headquarters in Gland, Switzerland.
So, the correct answer is option D.

Which of the following scientist has made a significant contribution in the field of classification?

zoology the living world history of classification of organisms introduction to classification of living organisms living world and classification

  1. Pasteur

  2. Oparin

  3. Darwin

  4. Linnaeus

Show answer
Correct Option: D
Explanation:

Pasteur, Oparin and Darwin are the scientists who are known for their contributions in the field of microbiology, biochemistry (theory for the origin of life) and evolution (origin of species) respectively. Carl Linnaeus gave the Linnaean taxonomy and binomial nomenclature. The classification and the nomenclature were published in the book Systema Naturae which was written by Carl Linnaeus. The binomial nomenclature for the classification of the organisms is considered as an important contribution. 

Thus, the correct answer is option D. 

Organisms called methanogens are most abundant in a

botany the living world archaebacteria the three domains of life classification of microbes

  1. Hot spring

  2. Sulphur rock

  3. Cattle yard

  4. Polluted stream

Show answer
Correct Option: C
Explanation:

Methanogens are the primitive bacteria belonging to archaea which are able to produce methane through the process of methanogenesis. These organisms can utilise the carbon dioxide and hydrogen gas to form methane. These organisms are found in marshy areas where they produce the marsh gas, in swamps and in the stomach of cattle. The methane is released along with the other wastes by the cattle and so, methane is found abundantly in the cattle yard. 

Thus, the correct answer is option C. 

Archaebacteria and eubacteria have been included under the kingdom

botany the living world archaebacteria the three domains of life classification of microbes

  1. Monera

  2. Plantae

  3. Fungi

  4. Protista

  5. Animalia

Show answer
Correct Option: A
Explanation:

Monera is a kingdom that includes prokaryotic unicellular organisms. It includes bacteria, Eubacteria, Archaebacteria, Cyanobacteria. They lack membrane-bound organelles. They also lack true nucleus. Instead, they have nucleoid, genetic material without nuclear envelope.

Thus, the correct answer is 'Monera.'

Archarbacteria with purple coloured pigment in cell membrane :

botany the living world archaebacteria the three domains of life classification of microbes

  1. Can survive in extreme saline conditions.

  2. Are chemoautotrophs

  3. Can use light energy to synthesize ATP

  4. Both (A) and (C)

Show answer
Correct Option: D
Explanation:

Answer is option D i.e. "Both (A) and (C)"
Archarbacteria are salt loving bacteria that can live in strong salt solutions. Hence they are also called halophiles. In presence of strong sunlight they develop a purple colored pigmented membrane to utilize light energy producing ATP.

Archaebacteria that flourish in temperature above $100^0C $ have special ______ molecules that do not coagulate at high temperatures and remain functional. 

botany the living world archaebacteria the three domains of life classification of microbes

  1. carbohydrate

  2. ester

  3. protein

  4. fat

Show answer
Correct Option: C
Explanation:
Archaebacteria that flourish in temperature above 100 degree C have special protein molecules that do not coagulate at high temperatures and remain functional.
So, the correct answer is 'protein' 

Methanogens do not produce:

botany the living world archaebacteria the three domains of life classification of microbes

  1. oxygen

  2. methane

  3. hydrogen sulphide

  4. carbon dioxide.

Show answer
Correct Option: A
Explanation:
Methanogens produce methane, hydrogen sulphide and carbon dioxide by methanogenesis.
So, the correct option is 'oxygen'

Study the following statements and select the correct ones.
(i) Methanogens are archaebacteria which produce methane in marshy areas.
(ii) Nostoc is a filamentous blue green alga which fixes atmospheric nitrogen.
(iii) Many members of the genus Glomus form mycorrhiza.

botany the living world archaebacteria the three domains of life classification of microbes

  1. (i) and (ii)

  2. (i) and (iii)

  3. (ii) and (iii)

  4. (i), (ii) and (iii)

Show answer
Correct Option: D
Explanation:
Methanogens are archaebacteria which produce methane in marshy areas. Nostoc is a filamentous blue-green alga which fixes atmospheric nitrogen. Many members of the genus Glomus form endomycorrhiza.
So, the correct option is '(i), (ii) and (iii)'