WorksheetsNatural Selection
Total questions: 13
Worksheet time: 30mins
Certain insects resemble the twigs of trees on which they live. The probable reason for this resemblance is that
the trees caused a mutation to occur
no mutations have taken place
natural selection has favored this trait
the insects needed to camouflage themselves
A large number of houseflies were sprayed with an insecticide. Houseflies that can survive and resist this insecticide support the concept that
species traits tend to remain constant
biocides cause mutations
variation exists within a species
the environment does not change
Which concept states that favorable variations allow organisms to adapt successfully to a change in the environment?
natural selection
use and disuse
artificial selection
reproductive isolation
Cattail plants are being replaced by purple loosestrife plants in swamps. The two species have very similar environmental requirements. This observation best illustrates
variation within a species
competition between species
isolation of species populations
random recombination
In an attempt to explain the diversity of living things, Darwin's theory of natural selection
proved evolution took place
described how mutations produced variations
showed that only the largest animals survive
described how evolution could have occurred
If a species can no longer produce offspring, the species will
become extinct
evolve into a new species
adapt to its environment
move to a new location
Evolution can be defined as
the change in size of body structures through use and disuse
the formation of fossils
a process of growth in an organism
a process of change through time
Penicillin no longer kills certain types of bacteria that it did kill in the past. What is the reason for this?
The mutation rate must have increased naturally.
The strains have become resistant because they needed to do so for survival.
A mutation was retained and passed on to succeeding generations because it had high survival value.
The principal forces influencing the pattern of survival in a population are isolation and mating.
After the Industrial Revolution, dark moths outnumbered white moths in cities. The reason for this change is
the trait for dark color became dominant over the trait for light color
the new environment favored the survival of dark moths over light moths
light colored moths turned dark
dark moths died due to overpopulation
Animals with favorable variations reproduce more successfully than organisms with less favorable variations. This statement best describes the concept of
overproduction
use and disuse
inheritance of acquired characteristics
survival of the fittest
A trait with low survival value to the members of a population will most likely
undergo a series of mutations in succeeding generations
cause the reproduction rate in individual organisms to increase
decrease in frequency from one generation to the next
remain unchanged in frequency through many generations
An explanation for observations is supported by many experiments is called
a theory
a control
homeostasis
a hypothesis
A cheetah can run short distances at very fast speeds. Such speed is an adaptation for
obtaining food
decreasing body temperature
increasing the rate of digestion
obtaining oxygen
