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61.

Assertion : Living organisms are regarded as closed systems.

Reason : Energy of living organisms cannot be lost or gained from the environment.

  • If both assertion and reason are true and reason is the correct explanation of assertion.

  • If both the assertion and reason are true but reason is not the correct explanation of assertion.

  • If assertion is true but reason is false.

  • If both the assertion and reason are false.


D.

If both the assertion and reason are false.

Living organisms are regarded as open systems as they can lose or gain the mass or energy from the surrounding environment. All living organisms restore their lost energy either from the sunlight or indirectly from the food material.


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62.

Assertion : Death is regarded as the most important regulatory process on earth. 

Reason : It avoids overcrowding, caused continuous reproduction.

  • If both assertion and reason are true and reason is the correct explanation of assertion.

  • If both the assertion and reason are true but reason is not the correct explanation of assertion

  • If assertion is true but reason is false

  • If both the assertion and reason are false


63.

Assertion : Systematics is the branch of biology that deals with classification of living organism.

Reason : The aim of classification is to group the organisms in an orderly manner.

  • If both assertion and reason are true and reason is the correct explanation of assertion.

  • If both the assertion and reason are true but reason is not the correct explanation of assertion.

  • If assertion is true but reason is false.

  • If both the assertion and reason are false.


64.

Which of the following statement(s) about taxonomical aids is/are true?

I. Keys are used to identify plants and animals based on similarities and dissimilarities.

II. Flora contains the account of habitat and distribution of plants in a given area.

III. Flora provide an index to the plant species found in a particular area.

IV. Monographs provide information for identifying the species found in an area.

  • I and II only

  • I, II and III only

  • I and IV only

  • I only

  • I only


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65.

Which one of the following shows, the hierarchial arrangement of taxonomic categories of plants in descending order?

  • Kingdom Division Class Order Family Species Genus

  • Kingdom  Division  Order  Class  Family  Species  Genus

  • Kingdom  Division  Order  Class  Family  Genus  Species

  • Kingdom  Division  Class  Order  Family  Genus  Species

  • Kingdom  Division  Class  Order  Family  Genus  Species


66.

Select the correct statement:

  • Biological names are generally in Greek and written in italics

  • Family comprises a group of related species which has more characters in common

  • Triticum aestivum comes under the order Sapindales

  • An order includes related classes

  • An order includes related classes


67.

An analytical taxonomic aid for identifying plants and animals based on similarities and dissimilarities is called

  • Catalogue

  • Flora

  • Manual

  • Key

  • Key


68.

Select the correctly written scientific name of Mango which was first described by Carolus Linnaeus

  • Mangifera indica Linn.

  • Mangifera indica

  • Mangifera Indica

  • Mangifera indica Car. Linn


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69.

PPLO are smallest cell in the living world. The extend form of PPLO is

  • Pseudo Pneumonia Length Orge

  • Pseudo Plank Leg Organelle

  • Penumonia Plank Like Organism

  • Pleuro Penumonia Like Organism


70.

How many sperms are formed by four primary spermatocytes

  • 1

  • 4

  • 16

  • 32


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