Evolution Question Preview (ID: 34907)
HSCA 6.
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What are homologous chromosomes?
a) 2 chromosomes, 1 from mom and 1 from dad
b) 2 chromosomes, 1 original and 1 replicated
c) 2 chromosomes, 1 for somatic cells and 1 for gametes
d) 2 chromatids, 1 from mom and 1 from dad
What is an allele?
a) The phenotype of the offspring.
b) Variations of a particular gene.
c) Homologous chromosomes
d) Activated genes.
All living creatures on earth share a common
a) descendant.
b) mating practice.
c) habitat.
d) ancestor.
All of the following are mechanisms for evolution except:
a) genetic variation
b) mutation
c) excellence
d) natural selection
Which of the following is NOT correct concerning natural selection?
a) Its purpose is to make perfect organisms.
b) It occurs when individuals in a population express genetic variation that leads to their having more offspring.
c) It results in an advantageous trait being more common in a population.
d) It can happen due to predation on a population.
A population of trees is suddenly dying due to global warming. Which of the following is most likely to happen?
a) Individual trees will quickly mutate so they adapt to the hot climate.
b) Many trees will die and the population could go extinct unless some trees are growing in a cooler environment.
c) The trees will produce offspring better suited for hot environments allowing the species to survive.
d) Individual trees will change their method of reproduction.
Which of the following is NOT evidence for evolution?
a) Fossils
b) DNA testing
c) Embryonic development
d) Personality tests
This basic mechanism for evolution is caused by random changes in the allele frequency of a population.
a) Genetic drift
b) Natural selection
c) Gene flow
d) Mutation
The combined genetic information of all the members of a particular population forms a _
a) phenotype
b) genotype
c) gene pool
d) niche
What is fitness?
a) Being the strongest animal in a population
b) Being the smartest animal in a population
c) Being the most attractive animal in a population
d) Being successful in passing on genes to the next generation.
A mutation in which type of cell would have the greatest ability to affect the evolution of a population?
a) Somatic cell
b) Gamete
c) Nerve cell
d) Neuron
The type of selection in which organisms of average size have greater fitness than very large or very small organisms is called
a) natural selection.
b) artificial selection.
c) stabilizing selection
d) disruptive selection
How is sexual reproduction a source of genetic variation?
a) The crossing over that occurs during meiosis increases genetic variation.
b) It leads to mutations that are inherently beneficial.
c) The offspring have more intelligence than the parents.
d) The offspring have more mutations than the parents.
Leg bones in whales, appendices in humans, eyes in the blind mole rat, and wings on an ostrich are all examples of
a) natural selection
b) homologous structures
c) vestigial structures
d) analogous structures
When the fossil record shows rapid geologic change interrupting a period of equilibrium this is known as
a) stasis
b) punctuated equilibrium
c) gene flow
d) selective mutations
Which of the following is subject to evolution?
a) Individuals within a population
b) A population
c) Cells within an individual
d) The genome of an individual
All of the following can disturb genetic equilibrium except
a) natural selection
b) sexual selection
c) mutations
d) large population size
When the allele frequency of a population is constant, the population is not
a) in equilibrium
b) evolving
c) static
d) small
This is the movement of genetic information into or out of a population
a) genetic drift
b) gene flow
c) sexual selection
d) natural selection
Which of the following is NOT correct regarding the Hardy-Weinberg principle?
a) The principle applies to individuals not populations.
b) The principle applies to populations not individuals.
c) The principle can be used to predict the frequency of alleles.
d) The principle states allele frequencies should remain constant unless factors cause them to change.
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