Natural Selection, Genetic Drift, Extinction: Question Preview (ID: 25033)

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How well an organism survives and reproduces in its environment can be described as its
a) fitness b) homologies c) common descent d) analogies
In genetic drift, a population changes due to
a) adaptations b) natural selection c) chance d) selective pressurs
Extinction can be caused by
a) changes in climate b) other organisms c) natural disasters d) all of the above
An adaptation is
a) a living thing b) an animal hunted of caught for food c) special traits of organisms that help them survive d) the chance of an organism surviving a situation
Which adaptation of the snowshoe hare gives warmth and camouflage in its cold/snowy environment?
a) large, flexible ears b) large, brown eyes c) thick, white fur d) wide, strong feet
Natural selections acts directly on
a) alleles b) phenotypes c) genotypes d) mutations
The process that results in changes of inherited traits over time
a) natural selection b) variation drift c) genetic drift d) gene pool stagnation
Genetic drift tends to occur in populations that are
a) large b) small c) size does not matter d)
A wildfire burns away all of the grass in an ecosystem. Which of the following explains the effects this will have on the other organisms within the ecosystem?
a) only grass eaters will be affected because their food source is gone b) only grass eaters and predators that eat these animals will be affected c) only the grass will be affected by the wildfire d) all organisms at each energy level within the ecosystem will be affected
Which is the best example of organisms that have been naturally selected?
a) Dark-colored peppered moths on soot-covered tree bark during the Industrial Revolution. b) Light-colored peppered moths on soot-covered tree bark during the Industrial Revolution. c) d)
Which scientist formulated the theory of evolution by natural selection?
a) Darwin b) Malthus c) Hutton d) LaMarck
Which of the following is NOT a component of the Theory of Evolution by Natural Selection?
a) variation among species b) inheritance of acquired characteristics c) competition for food and space d) survival and reproduction
One of the greatest evolutionary studies came from Darwin studying the _________ of finches.
a) feathers b) hearts c) mating calls d) beaks
Individuals who are better adapted
a) live longer b) reproduce more c) expand territory d) all of the above
Not all offspring that are produced will survive due to
a) genetic variation b) overproduction c) competition d) survival of the fittest
Genetic drift is
a) survival of the fittest b) survival of the luckiest c) related to adaptations d) none of the above
Which of the following is a natural and man-made factor of extinction?
a) volcanic activity b) over-harvesting c) oxygen depletion d) ice age
Because of _________________ all the individual finches are different.
a) the gene pool b) variation c) fitness d) genetic drift
Darwin's theory of Natural Selection is that the most _____ organisms survive.
a) dark b) tall c) short d) fit
Which of the following is true of genetic bottlenecks?
a) major environmental changes cause death of most members b) increased genetic diversity in a population c) reduce fertility of survivors d) some individuals of a species are moved to a new area
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