Genetic and Environment Interactions
Natural Selection
Evolution
Natural Selection Part 2
Organisms Identification and Relationships
100
True or False: The likelihood of a person getting lung cancer is only based on their genetic traits they inherit.
False
100
This process can be influenced by factors like isolation and resistance.
Natural Selection
100
These structures in different species suggest a shared ancestry.
Homologous Structures
100
In a small pond, the fish population grows rapidly due to abundant food and lack of predators. As the number of fish increases, the pond's resources become scarce, leading to competition for food and space. What issue does this scenario illustrate?
Overpopulation
100
This tool helps identify organisms based on a series of choices.
Dichotomous Key
200
The gene for having a light fur color in a rabbit may only be expressed if the temperature is below a certain point, demonstrating the role of this facto
Environment
200
This resistance can develop in insects exposed to chemicals meant to kill them.
Pesticide resistance
200
This type of genetic evidence can show evolutionary relationships between species.
Molecular Evidence
200
This process results in individuals with favorable traits surviving and reproducing.
Natural Selection
200
This system uses two names to scientifically identify organisms.
Scientific nomenclature
300
Which of the following is not an example of the environment affecting gene expression?
A.Himalayan rabbits whose fur changes based on temperature.
B.Human skin tanning based on the amount of melanin as exposure to UV rays.
C.An organism’s blood type.
D.pH of the soil changes the color of hydrangeas flowers.
C. An organisms blood type
300
This occurs when bacteria become immune to drugs designed to kill them.
Antibiotic Resistance
300
True or false: Butterfly and bat wings are homologous structures and do not indicate a common ancestor.
False--they do not have a common ancestor because they are analogous structures
300
Over time, these may emerge due to varying environmental conditions.
New species
300
True or false: All organisms represented on this cladogram are vertebrates?
True
400
In a forest, a group of frogs has developed darker skin pigmentation over several generations. This change is due to increased pollution in the area, which causes more shade and less sunlight reaching the forest floor. Scientists believe that the darker pigmentation helps the frogs absorb more heat in the cooler, shadier environment.
Question: What environmental factor is most likely influencing the gene expression that leads to darker skin pigmentation in these frogs?
A) Temperature changes due to increased shade
B) Increased availability of food sources
C) The presence of more predators
D) The frogs' genetic predisposition to have darker skin
A - Temperature changes due to increased shade
400
This is a trait that improves an organism's ability to survive and reproduce.
Adaptation
400
These small, random changes in an organism’s DNA can create variations within a population, which may lead to evolution over time.
Mutations
400
This can happen to a species that cannot adapt to changing conditions
Extinction
400
Which organism is least closely related to the cow:
Penguin
500
In a mountainous region, a species of wildflower exhibits different petal colors at varying altitudes. At lower altitudes, the flowers tend to have lighter petals, while at higher altitudes, the petals are darker. Researchers believe that the increased UV radiation at higher altitudes triggers the expression of genes responsible for producing pigments that protect the flowers from UV damage.
Question: What conclusion can be drawn about the relationship between altitude and petal color in these wildflowers?
A) As altitude increases, more flowers develop light petals.
B) Increased altitude does not affect petal color.
C) As altitude increases, more flowers develop dark petals to protect against UV radiation.
D) Petal color is random and not influenced by altitude.
C. As altitude increases, more flowers develop dark petals to protect against UV radiation
500
The Grand Canyon acts as a natural barrier that separates two populations of rock squirrels. Over time, this geographic isolation has led to distinct adaptations in each population, resulting in differences in fur color and behavior due to their separate environments. As a consequence, these squirrels have evolved into two different subspecies. This is an example of what?
Geographic Isolation
500
When two species evolve in such a way that one benefits from the relationship and the other is harmed, it is called this.
Parasitism
500
This process can lead to the creation of new species and the extinction of others.
Speciation
500
What is the name of organism C.
American Robin