Chapter 15 Biology Test Practice

Demographic studies of populations must take into consideration

• population density

• population dispersion

• population size

• All of the above

Natural selections acts

• only on recessive alleles

• on phenotypes that are expressed

• only on heterozygous genoytypes

• on all mutations

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Because of individuals in a population usually tend to produce more than one offspring,

• populations remain stable in size

• the number or individuals declines rapidly

• individuals tend to die quickly

• populations tend to increase in size

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As a population reaches its carrying capacity, there is an increase in competition for

• mates

• shelter

• food

• all of the above

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Which of the following are inappropriately paired?

• r-strategists- mature quickly

• K-strategists- minimal parental care

• r-strategists- reproduce early in life

• K-strategists- reproduce late in life

In 1908, Hardy and Weinberg independently demonstrated that

• dominant alleles do not replace recessive alleles in a population

• recessive alleles are usually more common than dominant alleles

• r- and K-strategist populations are actually the same

• recessive alleles replace dominant alleles in a population over long periods of time

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All of the following are true of r-strategists except?

• little parental care

• early maturation and reproduction

• few offspring

• small offspring

The movement of alleles into or out of a population due to migration is called

• natural selection

• nonrandom mating

• mutation

• gene flow

Environments that are unpredictable and rapidly changing tend to support populations of

• N-strategists

• Q-strategsits

• r-strategists

• K-strategists

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Actual proportions of homozygotes and heterozygotes can differ from Hardy-Weinberg predictions because of

• nonrandom mating among individuals

• the occurrence of mutations

• genetic drift within the population

• all of the above