Assertion (A): When scientists ask "what is life?", they attempt to answer what the purpose of life is.
Reason (R): Scientists seek the technical answer to what living is as opposed to the non-living and do not attempt to answer the philosophical question of life's purpose.
Scientists address the technical distinction between living and non-living, not the philosophical purpose of life.
Question 122 of 214
📘 CLASS XI
Assertion (A): The number of species known and described on Earth ranges between 1.7 to 1.8 million.
Reason (R): As we explore new areas, and even old ones, new organisms are continuously being identified.
The present estimate is correct, while continuous exploration explains future increases rather than the present count.
Question 123 of 214
📘 CLASS XI
Assertion (A): There is a fundamental need to standardise the naming of living organisms through nomenclature.
Reason (R): Local names for plants and animals vary from place to place, which would create confusion if standard names were not used.
Standardized nomenclature prevents confusion arising from multiple local names.
Question 124 of 214
📘 CLASS XI
Assertion (A): Nomenclature is only possible when an organism is described correctly.
Reason (R): We must know to what organism a name is attached, a process known as identification.
Correct identification is essential before assigning a scientific name to an organism.
Question 125 of 214
📘 CLASS XI
Assertion (A): The scientific names of plants are based on agreed principles provided in the ICZN.
Reason (R): ICZN stands for the International Code of Zoological Nomenclature.
Assertion (A): Scientific names ensure that each organism has only one name.
Reason (R): The description of any organism enables people globally to arrive at the same name and ensures it has not been used for any other known organism.
Scientific nomenclature ensures every organism has one unique name worldwide.
Question 127 of 214
📘 CLASS XI
Assertion (A): The naming system universally practiced by biologists is called binomial nomenclature.
Reason (R): Each scientific name has two components: the Generic name and the specific epithet.
The term "binomial" refers to the two-part scientific name consisting of the genus and specific epithet.
Question 128 of 214
📘 CLASS XI
Assertion (A): The binomial naming system was given by Ernst Mayr.
Reason (R): This naming system uses a two-word format that biologists found convenient.
Binomial nomenclature was introduced by Carolus Linnaeus, although it indeed uses a two-word format.
Question 129 of 214
📘 CLASS XI
Assertion (A): Biological names are generally written in Latin and printed in italics.
Reason (R): They are Latinised or derived from Latin irrespective of their geographical origin.
Scientific names are Latin or Latinised and are italicized to indicate their Latin origin.
Question 130 of 214
📘 CLASS XI
Assertion (A): In the biological name Mangifera indica, the word Mangifera must start with a capital letter.
Reason (R): According to the universal rules of nomenclature, the specific epithet starts with a capital letter.
The genus begins with a capital letter, whereas the specific epithet begins with a small letter.
