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.

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

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

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

• Kingdom $\leftarrow$Division $\leftarrow$Class $\leftarrow$Order $\leftarrow$Family $\leftarrow$Species $\leftarrow$Genus

• Kingdom $\leftarrow$ Division $\leftarrow$ Order $\leftarrow$ Class $\leftarrow$ Family  $\leftarrow$Species $\leftarrow$ Genus

• Kingdom $\to$ Division $\to$ Order $\to$ Class $\to$ Family  $\to$Genus $\to$ Species

• Kingdom $\to$ Division $\to$ Class $\to$ Order $\to$ Family $\to$ Genus $\to$ Species

• Kingdom $\to$ Division $\to$ Class $\to$ Order $\to$ Family $\to$ Genus $\to$ Species

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

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

• Catalogue

• Flora

• Manual

• Key

• Key

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

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

How many sperms are formed by four primary spermatocytes

• 1

• 4

• 16

• 32