Skin Color
It protects our DNA from UV damage.
What is melanin?
Change in traits over time
What is Evolution
Evolution due to random chance
What is genetic drift
Similar anatomy, different function
What are homologous structures?
Has the most intense UV exposure on Earth.
What is the Equator?
Process by which organisms with advantageous traits tend to survive
What is Natural selection
When two populations can no longer interbreed and produce fertile offspring.
What is reproductive isolation?
What is a cladogram/phylogenetic tree/ gene tree?
The study of fetal development before birth
What is embryology?
The sun's UV light destroys this vitamin.
What is Vitamin B (folate)?
reproductive success of an individual
What is fitness?
These two mechanisms INCREASE genetic variation in a species.
What are mutations and gene flow?
The more of these species have in common, the more related they are.
What are amino acids?
What are vestigial structures?
We need sunlight to synthesize this vitamin.
What is Vitamin D?
A phenotype that is NOT able to survive under selective pressure.
What is negative selection?
When the selected trait, or most common trait, moves from the AVERAGE phenotype to an EXTREME phenotype
What is directional selection?
Where two branches separate on a phylogenetic tree
What is a NODE (common ancestor)?
What are analogous structures?