Bold options are right one
Factors of speciation
Factors of speciation
What
is/are factor of speciation out of these…..
(a)mutuation
(b) natural selection (c) varation (d)
all of these
Which of the following produce evolutionary change?
(a) directional
selection (b) genetic drift (c)
gene flow (d) all of these
Genetic drift is most
powerful in
(a) stable
environments (b) small populations (C)
large populations
(d)
changing environment
The most prevalent form of evolution, and the one proposed
by Darwin, is (a) macroevolution (b) gradualism (c) saltation (d)
punctuated equilibrium
A type of speciation that allows for the production of
hybrids between two species is
(a) allopatric speciation
(b) sympatric (c) parapatric speciation (d) bottleneck
Genetic drift is
(a) generational fluctuations in gene frequencies that produce
no effect
(b) the effect of mutations as they spread through neighbouring
populations
(c) changes due to interbreeding with other species populations
(d) random
changes in gene frequency in a population
Gene flow is
(a)
the
migration of species populations to new areas
(b)
the movement of genes between species populations
(c)
the
exchange of genes during fertilization
(d)
mating
between close relatives
Natural selection operates on the _______ of an individual
organism.
(a) environment
(b)
genotype
(c)
phenotype
(d)
survival
Speciation because of geographical isolation is known as
(a) parapatric speciation
(b)
anagenesis
(c)
allopatric speciation
(d)
cladogenesis
Factors of speciation
A species may be reproductively isolated through which of
the following causes?
(a) anatomy
(b)
ecology
(c)
behavior
(d)
all the above
if the habitable depth of lakes is altered as a result of
pollution or the lowering of water levels rates of species formation will be…..
(a) increase (b) decrease (c) normal (d) none of these
New species form when individuals with certain
characteristics have a greater survival or reproductive rate than other
individuals in a population and pass on these inheritable genetic
characteristics to their offspring this is comes under
(a) natural selection (b) directional selection
(c) both of these (d) none of
these
reproductive isolation by pre-zygotic
mechanism include
(a)hybrid inviability (b) seed inviability (c)
mechanical isolation (d) None of
these
reproductive isolation by
post-zygotic mechanism include
(a)hybrid inviability (b) seed inviability (c)
F1 hybrid inviability(d) All of these
Mechanism of reproductive isolation
in which two species are inter fertile but have different pollinater ins called
……..
(a)
mechanical iso lation (b) ethological isolation (c) ecological isolation (d) none of these
Mechanism of reproductive isolation
in which two species occupy the same general area but have different habitat is
called ……..
(a) mechanical iso lation (b) ethological isolation (c)
ecological isolation (d) none
of these
Mechanism of reproductive isolation
in which two species are separated by a gap larger than their pollen and seed
dispersal is called ……..
(a) mechanical isolation (b) ethological isolation (c) ecological isolation (d) geographical
isolation
Mechanism of reproductive isolation
in which two species occupy the same general area but flowerd in different
seasons is called ……..
(a) mechanical isolation (b) ethological isolation (c) ecological isolation (d)
seasonal isolation
Factors of
speciation
Mechanism of reproductive isolation
in which two species occupy the same general area but flowerd in different
seasons is called ……..
(a) mechanical isolation (b) ethological isolation (c) ecological isolation (d)
temporal isolation
extrinsic reproductive isolating
factor that cause speciation is________
(a)
mututation (b) mountains
(c) rivers (d) both
b&c
Intrinsic reproductive isolating
factor that cause speciation is _______
(a)
mututation (b) mountains
(c) rivers (d) both
b&c
stasipatric speciation is caused by
______ factor
(a)
intrinsic (b) extrinsic (c)
both (d) none
sympatric speciation is caused by
______ factor
(a)
intrinsic (b) extrinsic (c)
both (d) none
which speciation is caused by
extrinsic factor
(a) sympatric (b)
stasipatric (c) parapatric (d)
all of these
which speciation is caused by
intrinsic factor
(a) sympatric (b)
allopatric (c) parapatric (d)
all of these
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