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Quiz 2
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Q.1
Sequence of taxonomic categories is …. [ AFMC 1992 ]
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a) Class – Phylum – tribe – Order – family -genus – Species
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b) Division – Class – Family – tribe – Order – Genus – Species
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c) Division – Class – Order – Family – Tribe – Genus – Species
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d) Phylum – Order – Class – Tribe – Family – Genus – Species
Explanation
Answer : (c)
Q.2
A homonym is … .. [ WB. 2008]
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a) Two or more names for the same taxon
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b) Species name repeats the generic name
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c) Identical name of two different taxa
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d) Name given to a taxon in local language
Explanation
In biology, a homonym is a name for a taxon that is identical in spelling to another such name, that belongs to a different taxon. Answer : (c)
Q.3
Which covers the largest number of organisms ….. [ Kerala 2001]
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a) Genus
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b) Family
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c) Phylum
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d) Class
Explanation
Answer : (c)
Q.4
First act in taxonomy is … .. [ AIIMS 1990]
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a) Description
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b) Identification
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c) Naming
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d) Classification
Explanation
Taxonomic identification is the recognition of the identity or essential character of an organism. On basis of charter organism is classified thus first act in taxonomy is Identification So, the correct order would be- Identification Classification Characterization Nomenclature Answer : (b)
Q.5
Total heat content of system is … [ KCET 2000 ]
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a) Free energy
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b) Enthalpy
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c) Entropy
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d) Kinetic energy
Explanation
Enthalpy is a thermodynamic quantity equivalent to the total heat content of a system Answer : (b)
Q.6
A taxon is
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a) A group of related families
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b) A group of related species
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c) A type of living organisms
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d) A taxonomic group of any ranking
Explanation
Taxon is a taxonomic category, as a species or genus. Or group of closely related organism Examples of taxonomic ranks are species, genus, family, order, class, phylum, kingdom, domain, etc. Answer : (d)
Q.7
Populations are said to be sympatric when … .. [ KCET 2010]
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a) Two populations live together and freely interbreed to produce sterile offspring
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b) Two populations are physically isolated by natural barriers
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c) Two populations are isolated but occasionally come together to interbreed
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d) Two populations share the same environment but cannot interbreed
Explanation
Sympatric species ,two species or populations are considered sympatric species when they exist in the same geographic area or share the same environment and thus frequently encounter one another. Species do not interbreed. Answer : (d)
Q.8
Find out the correct sequence in ascending order of hierarchy … [ KCET 2001]
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a) Phylum, Class, Family, Species, Order
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b) Species, Genus, Family, Order, Class
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c) Species, Genus, Phylum, Family, Class
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d) Class, Family, Species, Genus, Order
Explanation
Answer : (b)
Q.9
In nature, the biologically cohesive unit among the taxa is … … [ HPPMT 2012]
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a) Genus
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b) Order
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c) Phylum
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d) Species
Explanation
Cohesion species concept broaden the biological species concept by including asexual organisms and no giving much interbreeding in sexually reproducing organisms. A species, in this view, is a population, or series of populations, that has genetic or demographic cohesion. Answer : (d)
Q.10
Place of keeping and studying dry plants is … [ Wardha 2003]
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a) Arboretum
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b) Museum
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c) Vasculum
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d) Herbarium
Explanation
Herbarium is defined as a collection of plants that usually have been dried, pressed, preserved on sheets and arranged according to any accepted system of classification for future reference and study. Answer : (d)
Q.11
The third name is trinomial nomenclature is … ..[ [ JIPMER 1993 ]
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a) Species
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b) Subgenus
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c) Subspecies
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d) Ecotype
Explanation
In trinomial only one rank is allowed below the rank of species: subspecies. For example, Buteojamaicensis borealis is one of the subspecies of the red-tailed hawk species, Buteojamaicensis. Answer : (c)
Q.12
The generic name of Mango is .. .. [ HPPMT 2011 ]
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a) Mangifera indica
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b) Indica
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c) Mangifera
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d) Indica Mangifera
Explanation
Mangifera indica, commonly known as mango In taxonomy, the generic name refers to the first part of a binomial name of the species Answer : (c)
Q.13
Holotype is … .. [ Pb. PMT 2001 ]
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a) Specimen used by author as nomenclature type
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b) Specimen referred along with original description
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c) Duplicate of nomenclature type
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d) Specimen selected from original when nomenclature type is missing
Explanation
Holotypes a single type specimen upon which the description and name of a new species is based. Or we can say Specimen used by author as nomenclature type Answer : (a)
Q.14
Which is an exclusive trait of living things …[ CBSE 2011]
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a) Isolated metabolic reactions occur in vitro
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b) Increase in mass from inside body
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c) Perception of events happening in the environment and their memory
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d) Increase in mass by accumulation of material both on surface as well as internally.
Explanation
Cellular Metabolism is a defining feature of all living organisms without exception. An isolated metabolic reaction is the reaction which is carried out in-vitro i.e. outside the cell in a cell-free system. Such reactions are performed in a test tube. Hence, they are living reactions but not living things, but surely living reactions Option c: Event : an event is defined as a change in both time and space, for example in case of non living such as Land slide and volcanic eruption. memory is the retention of information over time, so geological changes is memory. Option "c" is not correct" Answer : (a)
Q.15
Keystone species are … .. [ Pb PMT 2001]
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a) Species belonging to same period
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b) Species that determine structure of biotic community
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c) Species reproducing sexually
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d) Species recorded only in the fossil state.
Explanation
A keystone species is often a dominant predator whose removal allows a prey population to explode and often decreases overall diversity. Or species that determine structure of biotic community. Answer : (b)
Q.16
Taxon is … ..[ CET chd. 2000 ]
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a) Species
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b) Classification
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c) Highest rank in classification
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d) Group of closely related organisms
Explanation
Taxon is taxonomic group of any rank, such as a species, family, or class. Or group of closely related organisms Answer : (d)
Q.17
Species is … .. [ CBSE 1994]
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a) Specific unit of evolution
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b) Specific unit in the evolutionary history of race.
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c) Specific class of evolution
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d) Not related to evolution
Explanation
a group of living organisms consisting of similar individuals capable of exchanging genes or interbreeding. The species is the principal natural taxonomic unit, ranking below a genus and denoted by a Latin binomial, e.g. Homo sapiens They are specific unit of evolution Answer : (a)
Q.18
Assertion : Systematic is branch of biology that deals with classification of organisms. Reason.: Aim of classification is to group the organisms in orderly manner … [ AIIMS 2003]
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a) Both Assertion and Reason are true and Reason is the correct explanation of Assertion
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b) The Assertion and Reason are true but Reason is not correct explanation of Assertion
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c) Assertion is true but, Reason is false
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d) Assertion is false but, Reason is true
Explanation
Aim of systematic is to develop affinities among organisms. The comparison of organisms gives resemblances and differences to varying degrees. Classification focuses only on similarity Answer : (b)
Q.19
A group of related genera which resemble each other in floral characteristics represent …[ CET Chd2011]
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a) Order
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b) Taxa
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c) Family
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d) Species
Explanation
A family is a scientific grouping of closely related organisms or group of related genera which resemble each other Answer : (c)
Q.20
Which one is incorrect … [ CET chd. 2002]
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a) New individuals replace the dead ones
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b) Homeostasis produces a self regulated steady state
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c) Most homeostatic mechanisms operate through feed-back systems
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d) Cell obtains instructions for divisions from a hereditary protein.
Explanation
Cell obtains instructions for divisions from its genes, and genes are not proteins. Most genes contain the information needed to make functional molecules called proteins Answer : (d)
Q.21
Which is correct hierarchical order? …[ Wardha 2005]
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a) Division – order – family – class
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b) Family – class – order – division
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c) Family – order – class – division
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d) Order – class – family – division
Explanation
Option c is in from down to up but is in order or order is reversed Answer : (c)
Q.22
Which taxonomic aid gives comprehensive account of complete compiled information of genus or family at a particular time? [ Kerala 2009]
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a) Taxonomic key
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b) Herbarium
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c) Monograph
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d) Flora
Explanation
Monograph a detailed written study of a single specialized subject or an aspect of it. Taxonomic Key: is a device used by biologists for identifying unknown organisms. Herbarium is defined as a collection of plants that usually have been dried, pressed, preserved on sheets and arranged according to any accepted system of classification for future reference and study. Thus Monograph is only taxonomical aid to give comprehensive account Answer : (c)
Q.23
Assertion (A): Scientific name Malus malus is illegitimate Reason (R): It is tautonym Explanation is provided, click on
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a) Both (A) and (R) are correct with (R) being correct explanation of (A)
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b) Both (A) and (R) are true but (R) is not correct explanation of (A)
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c) (A) true but (R) is false
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d) (A) is false but (R) is true
Explanation
Malus is a genus of about 30–55 species of small deciduous apple trees Tautonym is not acceptable in plants Answer : (a)
Q.24
Match and find the correct options .. … [ kerala 2011]
1) Plantae
p) Aechaebacteria
2) Fungi
q) Euglenoids
3) Protista
r) Phycomycetes
4) Monera
s) Algae
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a) 1 – s, 2 – r, 3- q, 4 – p
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b) 1 – p, 2 – q, 3- r, 4 - s
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c) 1 – r, 2 – s, 3- q, 4 - p
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d) 1 – s, 2 – q, 3- r, 4 - p
Explanation
Green Algae are considered as plantae Phycomycetes is an obsolete polyphyletic taxon for certain fungi. Phycomycetes are also known as algal fungi Euglena is a genus of single cell flagellate eukaryotics. It is the best known Species of Euglena were among the first protists to be seen under the microscope The kingdom Monera is divided into two groups Archaebacteria and Eubacteria. Answer : (a)
Q.25
ICBN is … .. [ DPMT 2003]
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a) International Code of Biological Naming
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b) International Code of Botanical Nomenclature
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c) International Class of Biological Nomenclature.
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d) International Classification of Biological nomenclature
Explanation
Answer : (b)
Q.26
Nicotiana is … .. [ Har. PMT 2001]
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a) Variety
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b) Subspecies
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c) Species
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d) Genus
Explanation
Nicotiana is a genus of herbaceous plants and shrubs of the family Solanaceae. commonly referred to as tobacco plants Answer : (d)
Q.27
Two or more species occupying same or overlapping area are … … [ BHU 1990 ]
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a) Sympatric
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b) Sibling
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c) Subspecies
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d) Allopatric
Explanation
Sympatric species ,two species or populations are considered sympatric species when they exist in the same geographic area or share the same environment and thus frequently encounter one another. Species do not interbreed. Answer : (a)
Q.28
Sweating is meant for .. .. [ CPMT 1991]
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a) Killing of shin bacteria
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b) Regulation of body temperature
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c) Removal of excess salt
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d) Removal of excess water
Explanation
Sweating helps your body: Maintain proper temperature and keep you from overheating. Secondary benefit of expel toxins, which supports proper immune function and helps prevent diseases related to toxic overload. Answer : (b)
Q.29
Point out the correct method of showing scientific name of Coconut Palm … .. [ KCET 2012]
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a) Coco Nucifera
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b) cocos Nucifera
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c) cocos nucifera
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d) Cocos nucifera
Explanation
Option a is wrong as it is Cocos not Coco Option b and c not followed binomial rule. The genus or generic name first letter in capital, species name first letter in small Answer : (d)
Q.30
Statement (S) : Species are groups of potentially interbreeding natural populations that are isolated from other such groups Reason(R) : reproductive isolation brings about distinctive morphological characters ... .... [ E.A.M.C.E.T 2005 ]
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a) Both (S) and (R) are true and (R) is correct explanation of (S)
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b) Only (S) is true, (R) is false
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c) Both (S) and (R) are wrong
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d) Both (S) and (R) are true, but (R) is not correct explanation of (S)
Explanation
Minimal morphological differences between species, differences in behavior can be enough to prevent mating. Thus morphological character is not alone for Speciation Answer : (d)
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