Speciation
1) In course of evolution the formation of new
species is called...
a) Genetic
drift b)
speciation
c) Ecological niche d)
none
2)
Which of the following does not
tend to promote speciation?
a) Founder effect b) Reproductive
isolation
c) Natural selection c) gene flow
3)
The two key factors responsible for speciation among populations are:
a) Mutation and heterozygote disadvantage
b) Reproductive isolation and genetic divergence
c) Post zygotic isolation and morphological change
d) Mutation and genetic drift
4) What sort of characters is useful in
constructing phylogenetic trees?
a).
homologous traits b) analogous traits
c) Shared
derived traits d) a and c
5) According to
Darwin's theory of evolution, differences between species may be the result
of
a) The disuse of body structure b) the transmission of acquired characteristics
a) The disuse of body structure b) the transmission of acquired characteristics
b)
Spontaneous
generation d) organic evolution
6) The concept that species have changed over
long periods of time is known as
a) ecology b) embryology
a) ecology b) embryology
c) gene flow d) all of them
7) Two important
processes occurring during the process of speciation are .
a)
Evolution b) genetic
differentiation
c) Phenotypic
differentiation d) both b and c
8) Which one is
considered as the basic unit of taxonomy?
a) Class b) specie
c) Sub specie d) form
9) A group of plants
which breed true within their limits of variations
a) Du Reitz b) Linnaeus
c) Fredrick Muller c) Wiley and Simpson
10) A group of
species capable of limited genetic exchange are called
a) Ecotype
species b) eco
species
c) Co-eno species d) all of them
11) “Species are the
groups of interbreeding natural populations that are reproductively isolated
from other such groups “
a) Historical spp
concept b) biological spp concept
c) Typological spp
concept d) taxonomic spp
concept
12) The recognition
of biological specie involves the processes
a) Natural
populations b)
reproductive isolation
c) Out breeding d) both a and b
13) Who was the first
scientist to coin the term speciation for splitting or clad genesis..
a) Linnaeus b) Orator f.Cook
c) Du Reitz d) none
14) The speciation in
which two previously independent species fuse together to give rise a new third
species being themselves extinct
a) Gradual
speciation b)
phyletic speciation
c) Additive speciation d) abrupt speciation
15) In isolation
changes in the gene pool occurs through the combination of
a) Genetic rift b) natural
selection
c) Founder
effect d) all of them
16) The formation of a number of diverse species
from a single ancestral one is known as
a) Phyletic
speciation b) additive speciation
c) Both a and b d) none of
them
17) A geographically defined population that is genetically
distinguishable from other local populations but is capable of exchanging genes
with those other local populations is sometimes called a
a) Geographical race b) geographical
development
b) Development d)
none
18) The populations reunited at the junction
cannot interbreed, then the
definition of separate species has been met this type of speciation is
called
a) Sympatric b) parapatric
c) Allopatric
d) alloparapatric
19) The speciation which results from spontaneous
chromosomal modification is called
a) Sympatric b)
alloparapatric
c) Stasipatric
d) none of them
20) The individuals
of stasipatric speciation are fully viable only in state
a) Heterozygous b)
homozygous
c) Both a and b d)
none of them
21) If gene flow will
be high the differentiation will be
a) High
b) low
c) Both a and b d)
none
22) The speciation
results from hybridization process with no geographical isolation of
populations called
a) Parapatric b) sympatric
c) Allopatric d) all of them
23) Allopatric,
parapatric speciation are included in mechanism...
a) Reductive b) extrinsic
c) Intrinsic
d) all of them
24) Individuals of
species vary from specie to specie morphologically, genetically and heritable
is called
a) Speciation
b) dimorphism
c) Polymorphism d)
all of them
25) Mutation or
recombination caused by cytoplasmic genes usually inherited maternally...
a) Environmental
variations b) genetic variations
c) Developmental
variations d)
all of them
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