Evolution 1
The process in which a species has changed over time is known as this.
What is evolution?
A mule can survive to adulthood but cannot reproduce. This is an example of this reproductive barrier.
What is hybrid sterility?
The ability of an individual to survive and reproduce is known as this.
What is fitness?
This is the process by which a new species evolves.
What is speciation?
Some weed species have developed the ability to resist pesticides. How does the theory of evolution by natural selection help to explain his ability?
What are genetic variations?
Similar structures that evolved from a common ancestor such as bones humans, cats, bats, and whales have in common.
What are Homologous Structures?
Mutations can be beneficial, harmful, or this third possibility.
What is neutral?
Any inherited trait that increases an organism's chance of survival is known as this.
What is an adaptation?
A river separates one squirrel population into two groups for thousands of years. What is this type of isolation?
Geographic isolation
A record of Earth changing over a long period of time
What is fossil record?
Preserved remains of ancient organisms
What are fossils?
This term refers to different traits and alleles within a population.
What is variation?
The concept that organisms who are the best suited to their environment will be the most successful
What is survival of the fittest?
This type of vestigial structure is found in our digestive system. This organ used to be used to digest cellulose for our ancient ancestors.
What is the appendix?
This specialized mussel structure mimics prey to attract fish hosts.
What is a mantle lure?
Different mussel species needing different host fish is known as this.
What is host specificity?
What is the function of Antibiotics?
What is to kill or slow the growth of bacteria?
Structures that have no apparent function and appear to be residual parts from a past ancestor
What are Vestigial Structures?
This term describes a population becoming better suited to its environment over generations.
What is adaptation?
Which term refers to the process by which individuals that are better suited to the environment survive and reproduce therefore passing down their genes to their offspring?
What is Natural Selection?
True or False: Individuals evolve during their lifetime. Explain your reasoning.
False. Populations evolve over generations, not individual organisms.
A mutation causes thicker fur in a rabbit population living in a colder environment. Explain why this trait may become more common over time.
Rabbits with thicker fur are more likely to survive and reproduce in the cold, so they pass the trait to offspring more often through natural selection.
These larval mussels attach to fish gills during development.
What are glochidia?
When one organism resembles another species to gain an advantage, it is called this.
What is mimicry?
A barrier that prevents mating before fertilization is called this.
What is a prezygotic barrier?
Two species of frogs breed during different seasons. This is an example of this type of isolation.
What is temporal isolation?
Why are mutations considered the “source” of genetic variation?
Mutations create new DNA sequences and traits that natural selection can act on.
Animals and plants can change as a ______________ but not as an individual.
species
A mistake or change that occurs in the DNA sequence is called a ______________________.
What is a mutation?