Who was the scientist who deemed natural selection as the mechanism of evolution?
Charles Darwin
True or False: Asexual Reproduction is a source of genetic variation
False
True or False: Individual organisms evolve over a lifetime.
False- populations evolve
What is the BEST evidence for evolution?
Homology: similarities between genes and proteins
This type of selection happens when environmental changes favor one phenotype over another
Directional Selection
What part of the Galapagos finch did Darwin observe and study?
Beaks
A mountain range separates two populations of deer from mating. What type of isolation is this?
Geographical Isolation
The ultimate source of variation in a population
Mutation
What type of structures are exhibited by the figure?
Homologous Structures
The consistent size of babies at birth is an example of which type of selection?
Stabilizing Selection
This term refers to how well an organism is suited for its environment, its ability to survive and reproduce, and the adaptation of characteristics important for survival.
Survival of the Fittest
A diagram that reflects evolutionary relationships
Evolutionary Tree
When the allele frequency of a population can change if members of an existing population leave, or new members join
Migration
There are 5 pieces of evidence for evolution.
1. Direct Observations
2. Similarities in Embryology
3. Geographical Distribution
4. Homologous Structures
What is the 5th one?
Fossil Records
What type of selection does this picture represent?
Stabilizing Selection
What is the fitness score of a mule?
Zero
This type of evolution is defined as independent evolution of similar features in different lineages
Convergent Evolution
You accidently step on a population of beetles, and randomly kill all of the brown ones. This changes the allele frequency within the population. This is an example of?
Genetic Drift (Bottleneck Effect)
Why is embryology evidence for evolution?
The way organisms develop lead to homologous structures.
When humans breed dogs to favor specific characteristics, this is an example of what?
Artificial Selection
Darwin based his theory of natural selection as the driving force for evolution from these 4 observations
Reproduction, Variation, Heredity, and Fitness
Which of these is not a characteristic of a chordate when looking at embryology?
Notochord, Vertebrae, Postanal Tail, or Pharyngeal Pouches
Vertebrae
If a trait is polygenic, how many alleles does it have?
More than two
What best describes the structure indicated by the letter C?
Vestigial Structure
What type of selection does this picture represent?
Disruptive Selection