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Total questions: 15
Worksheet time: 12mins
Fossil records show that black bears increased in size during the Ice Age and decreased in size with warmer temperatures. What type of selection do these changes in size represent?
Allopatric
Directional
Disruptive
Stabilizing
Which of the following defines a gene pool?
The sum of alleles in an individual of a given species
An organism's complete set of DNA, including all of its genes.
The degree of variation in alleles present in an interbreeding population
The total collection of different alleles in an interbreeding population
What is an inherited characteristic that helps organisms survive?
Evolution
Adaptation
Natural Selection
Extinction
Natural selection is the process that passes down ____________________ traits.
Same
Old
Useless
Favorable
A mistake or change that occurs in the DNA sequence is called a ______________________.
Extinction
Speciation
Mutation
Genetic Variation
Temporal isolation occurs when two different populations:
develop different mating behavior
become geographically separated
reproduce at different times
interbreed
The formation of new species is called
Speciation
Evolution
Natural selection
Mutations
Which of the following is the best definition of species?
A group of organisms that lives in the same habitat
A group o organisms that exploit the same ecological niche
A group of organisms that can interbreed to produce viable offspring under natural conditions
A group of organisms that have the same appearance
What is another name for natural selection?
survival of the smartest
survival of the fastest
survival of the biggest
survival of the fittest
The three species pictured do not share a common ancestor, yet have evolved to have a similar anatomy and life style. This is an example of ?
Homologous Structures
Divergent Evolution
Vestigial Organs
Convergent Evolution
According to most scientists, what is the ultimate cause of most mass extinctions?
overhunting
evolution of new species to replace old ones
major change in environment due to extreme natural events
asteroid impact
Species that are in danger of becoming extinct are called __________.
endangered
not lucky
extinct
in a jam
