Natural Selection of "Strawfish" Lab
Members of a species that live in the same location are referred to as a
Population
An observable characteristic or trait of an organism is referred to as an
Phenotype
A(n) _____ is an alternative form of a gene.
allele
An individual's combination of alleles for a particular gene is called a (n):
Genotype
The complete set of genes in a given population of organisms is called the:
Gene pool
_____ _____ is the mechanism, first described by Charles Darwin, that brings about
adaptation to the environment, as evolution occurs.
Natural selection
The theory of evolution by natural selection requires which of the following conditions be
met:
Genetic variation must lead to differences in reproduction success
Genetic variation must be transmissible to the next generation
Genetic variation must exist in the population
All genetic variation is the result of _____.
Mutation
A(n) ______ is all of the members of a species that live in a defined geographical area.
Population
The process by which populations evolve is called:
Natural selection
A key concept in the theory of evolution by natural selection is that genetic variation in a
population can result in some individuals having a greater level of _____ success.
Reproductive
Which scenario explains the natural selection of antibiotic resistance in bacteria?
A small number of individuals in a population have mutations in existing genes that provide
resistance against a given antibiotic. The presence of the antibiotic selects for these individuals.
The general mechanisms of bacterial antibiotic resistance are:
Modifications to the sites at which the drug binds
The use of alternative metabolic pathways
Enzymatic activity that modifies the structure of the drug
Decreased permeability of the cell to the drug
Rapid transport of the drug out of the cell
Which of the following is the basis of streptomycin antimicrobial activity?
Inhibition of protein synthesis
True or false: Mutations that provide resistance to an antibiotic occur in response to the
presence of the antibiotic in the environment that the bacteria live in.
False
Natural selection can act upon:
Both animals in the wild and bacteria growing on media plates
Members of a species that live in the same location are referred to as a
Population
An observable characteristic or trait of an organism is referred to as an
Phenotype
A(n) _____ is an alternative form of a gene.
allele
An individual's combination of alleles for a particular gene is called a (n):
Genotype
The complete set of genes in a given population of organisms is called the:
Gene pool
_____ _____ is the mechanism, first described by Charles Darwin, that brings about
adaptation to the environment, as evolution occurs.
Natural selection
The theory of evolution by natural selection requires which of the following conditions be
met:
Genetic variation must lead to differences in reproduction success
Genetic variation must be transmissible to the next generation
Genetic variation must exist in the population
All genetic variation is the result of _____.
Mutation
A(n) ______ is all of the members of a species that live in a defined geographical area.
Population
The process by which populations evolve is called:
Natural selection
A key concept in the theory of evolution by natural selection is that genetic variation in a
population can result in some individuals having a greater level of _____ success.
Reproductive
Which scenario explains the natural selection of antibiotic resistance in bacteria?
A small number of individuals in a population have mutations in existing genes that provide
resistance against a given antibiotic. The presence of the antibiotic selects for these individuals.
The general mechanisms of bacterial antibiotic resistance are:
Modifications to the sites at which the drug binds
The use of alternative metabolic pathways
Enzymatic activity that modifies the structure of the drug
Decreased permeability of the cell to the drug
Rapid transport of the drug out of the cell
Which of the following is the basis of streptomycin antimicrobial activity?
Inhibition of protein synthesis
True or false: Mutations that provide resistance to an antibiotic occur in response to the
presence of the antibiotic in the environment that the bacteria live in.
False
Natural selection can act upon:
Both animals in the wild and bacteria growing on media plates
