What term is used to describe organisms that are best fit (adapted) for their environment, survive, and pass on their traits to the next generation
Natural selection
What term describes how well an organism can survive and reproduce in its environment.
Fitness
In order for natural selection to happen, three things must occur
1. Best fit for the environment they live in
2. Survive
3. Reproduce
T or F Variations in offspring are naturally found in nature
True
T or F The principle of common descent states that all organisms on Earth have evolved from a common ancestor.
True
he study of past and present distribution of organisms.
Biogeography
Vestigial structures are structures are inherited from ancestors but have lost all original function due to different selection pressures
The blind cave fish
Homologous structures are structures that are shared by related species and that have been inherited by a common ancestor.
limbs of vetrembre organism having the same bones
Analogous structures are body parts that share common function, but not structure.
A bees wing structure
The Galapagos finches were adapted to live on each island by what body structure?
Beak size
What molecular evidence is used today to show relationships between organisms.
1. DNA 2. Amino acid
n natural selection, nature selects the variations of traits that are passed onto the next generation, In artificial selection, humans select the variations that are passed onto the next generation.
Plants and animals
Differences in DNA and amino acid sequences can be used to determine when a species split from a common ancestor
Human and chimp
Embryological evidence can be used to show relationships between closely related species through _____________________ structures?
Homologous