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12th Grade > Biology

THE LIVING WORLD MCQs

The Living World, Living Organisms And Their Surroundings, Diversity In Living Organisms

Total Questions : 114 | Page 5 of 12 pages
Question 41. Which of the following is the locomotary organ of paramecium?
  1.    Pseudopodia
  2.    Cilia
  3.    Flagella
  4.    Chitin
 Discuss Question
Answer: Option B. -> Cilia
:
B
Paramecium is a genus of unicellular ciliated protozoa. The locomotory structure paramecium is cilia.They are characterised by the presence of thousands of cilia covering their body. They are found in freshwater, marine and brackish water.
Which Of The Following Is The Locomotary Organ Of Paramecium...
Question 42. The five kingdom classification was proposed by ________.
  1.    Ernst Haeckel
  2.    Robert Whittaker
  3.    Aristotle
  4.    Carolus Linnaeus
 Discuss Question
Answer: Option B. -> Robert Whittaker
:
B
Robert Whittaker proposed the five kingdom classification of organisms. The five kingdoms proposed by Whittaker areMonera, Protista, Fungi, Plantae and Animalia.
Question 43. A scientific name contains information about the
  1.    Family and Species
  2.    Genus and Species
  3.    Phylum and Order
  4.    Class and Family
 Discuss Question
Answer: Option B. -> Genus and Species
:
B
Binomial nomenclature is a formal system of naming species of living things by giving each a name composed of two parts, both of which use Latin grammatical forms, although they can be based on words from other languages. Such a name is called a binomial name, a binomen or a scientific name; more informally it is also called a Latin name. The first part of the name identifies the genus to which the species belongs; the second part identifies the respective species within the genus. For example, humans belong to the genus Homo and within this genus, to the species sapiens. The scientific name is thus, Homo sapiens.
Question 44. Taxonomic category of ‘Order’ comes in between
  1.    Class and Family
  2.    Kingdom and Class
  3.    Family and Genus
  4.    Phylum and Class
 Discuss Question
Answer: Option A. -> Class and Family
:
A
The descending order of taxonomic hierarchy is Kingdom, Phylum or Division, Class, Order, Family, Genus, Species. Thus, Order comes between Class and Family.
Question 45. A tautonym in taxonomy is
  1.    Non latinised name
  2.    Same name for genus and species
  3.    Common name used as scientific name
  4.    Unscientific explanation of a phenomenon
 Discuss Question
Answer: Option B. -> Same name for genus and species
:
B
A tautonym is a binomial name in which the genus and the species are given the same name. For example, there exists a species of gorilla whose scientific name is Gorilla gorilla. Iguana iguana is another example of a tautonym.
Question 46. A ___ is a collection of plants that have been dried, pressed and preserved on sheets.
 Discuss Question

:
A herbarium is a taxonomical aid, andis a collection of plants that have been dried, pressed and preserved on sheets.
Question 47. Linnaeus is credited with introducing
  1.    The concept of inheritance
  2.    The theory of heredity
  3.    Binomial nomenclature
  4.    Theory of evolution
 Discuss Question
Answer: Option C. -> Binomial nomenclature
:
C
Linnaeus is famous for introducing binomial nomenclature, which is the scientific system of naming living organisms.
Question 48. Regarding the assertion and reason; choose the correct option.
Assertion [A]: The various grades of taxa are interlinked.
Reason [R]: The relations and similarities increase in the descending order (with regard to the size of the taxon).
  1.    Assertion [A] is True and Reason [R] is False.
  2.    Reason [R] is True and Assertion [A] is False.
  3.    Assertion [A] is True and Reason [R] is True and is a correct explanation for [A].
  4.    Assertion [A] is True and Reason [R] is True but is an incorrect explanation to [A].
 Discuss Question
Answer: Option C. -> Assertion [A] is True and Reason [R] is True and is a correct explanation for [A].
:
C
Taxa are arranged in ahierarchical manner from a small group of very closely related organisms to a broader group with more dissimilarities. As we go in the ascending order the number of common characteristics decreases and the grade increases and vice-versa, that is in the descending order, the number of common characteristics increases and the grade decreases. For example, any genus (lower grade of classification) has members with more similarities as compared to a family (ahigher grade of classification) which has members with fewer similarities among them.
Question 49. Which one of the following is not a correct statement?
  1.    Key is a taxonomic aid for identification of specimens.
  2.    A museum has a collection of photographs of plants and animals.
  3.    Botanical gardens have a collection of living plants for reference.
  4.    Herbarium houses dried, pressed and preserved plant specimens.
 Discuss Question
Answer: Option B. -> A museum has a collection of photographs of plants and animals.
:
B
A museum has a collection of preserved plant and animal specimens for study and reference.Specimens are preserved in containers or jars in preservative solutions. Plant and animal specimens may also be preserved as dry specimens. Insects are preserved in insect boxes after collecting, killing and pinning. Larger animals like birds and mammals are usually stuffed and preserved. Museums often have collections of skeletons of animals too.
Question 50. Name the taxonomist(s) who wrote Species Plantarum and Systema Naturae.
  1.    Bentham and Hooker
  2.    John Ray
  3.    Linnaeus
  4.    De Candolle
 Discuss Question
Answer: Option C. -> Linnaeus
:
C
Species Plantarum(Latin for "The Species of Plants") is a book by Carl Linnaeus, originally published in 1753. It lists every species of plant known at that point of time, classified into genera. It is considered to be the place, where plant nomenclature began. Systema Naturae was yet another important publication of Linnaeus, the first edition of which was published in 1735. The tenth edition, considered to be the most important one, is where Linnaeus describes zoological nomenclature.

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