Prework
Proteins are involved in _______ cellular processes.
Almost all
The field of ________ studies life
Biology
Which of the following would you expect to see between two species that have a close evolutionary relationship?
Closely matching genetic information
Normally, the flow of information in a cell is in which direction?
DNA to RNA to protein
The scientific definition of ______ refers to changes in a species or population over time.
Evolution
The mineralized traces of formerly living species are called ________.
Fossils
Select all that apply. If you were to create a list to summarize the scientific evidence that supports the idea that populations evolve over time, which of these items would you include?
Homologous structures Fossils DNA molecules
Which of these is a component of the process of natural selection?
Individuals vary in their traits.
Because individuals vary in their traits, compete for resources, and vary in their fitness, the final component of natural selection results. What is this final step?
Populations become adapted to their environment.
Which molecules within a cell are involved in nearly every cellular process?
Proteins
Which of these molecules contain instructions for specific traits?
RNA DNA
Select all that apply to complete this sentence. Fossils often form when the ______ of once-living organisms mineralize over time.
Teeth Bones Shells
Which statement summarizes the scientific evidence that supports the idea that populations evolve over time?
The idea that populations evolve over time is supported by physical evidence (including fossils, homologous structures, and embryonic development) and chemical evidence (including DNA and protein sequences).
Evolution, by its scientific definition, refers to
changes in a species or population over time.
If a favorable mutation increases the ability of an individual to reproduce then natural selection would
favor this variation.
The process of natural selection
favors some mutations, when they increase fitness.
One of the components of the process of natural selection is based upon an individual's ability to compete for resources in order to survive and reproduce. This component addresses the
fitness of individuals.
If two species have very similar genetic information, this means that they
have a close evolutionary relationship.
The genetic material of living things, DNA, or of a virus, which may be DNA or RNA, contains
instructions for specific traits.
The process that drives evolution, and relies on variation in individuals, competition among individuals, differences in individual fitness, and adaptation to the environment, is called
natural selection
In support of the idea that species change over time, Darwin proposed a four-step process called
natural selection.
One of the steps in the process of natural selection involves the individual's struggle to exist, which is based upon competition for available _____ like food and shelter.
resources