Natural Selection
___________ The theory discovered by Darwin that states that organisms that are most fit for their environment are able to survive nd reproduce more.
Natural Selection
Body parts that have lost their original function through evolution.
Vestigial Structure
Which organisms are closer relatives: a dolphin and shark or a human and a dolphin?
human and dolphin
The science of the development of embryos from fertilization to birth.
Naturally preserved remains, imprints or traces of organisms that lived long ago are called what?
The ability to survive and reproduce
Fitness
Body parts of organisms that are similar in structure and position, but different in function.
The same word fit's for both fill in the blank: All organisms on earth have ______.
DNA
An unborn or unhatched offspring in the process of development.
An embryo
When a species appears in the fossil record that was originally thought to be complete
Sudden Appearance
Anything that affects the fitness of an organism within a given environment that drives the process of evolution.
Selective pressure
The leg of a cat and the wing of a bat are an example of:
Homologous Structures
What do scientists study when looking at molecular evidences of evolution?
DNA and/or RNA
All humans have tails as embryos. What do these tails develop into before we are born?
Our tailbone
Generally, the older the fossil are ______ in Earth
deeper
Dark mice and light mice live on light colored rocks, and hawks are their main predator. Which mouse is most fit for this environment?
Light Mice
Humans: tails
Whales: hip bones
Are examples of what kind of structure?
Vestigial
More
The more closely related the species the _______ they look the same during embryonic development.
longer
When a species shows no change throughout the fossil record we call this:
Stasis
Dark mice and light mice live on light colored rocks, and hawks are their main predator. A sudden shift in the air quality causes the rocks to turn dark, what will happen to the population?
Hint: The number of ________ mice will increase and the number of _______ mice will decrease.
The number of dark mice will increase and the number of light mice will decrease.
Do homologous or vestigial structures give us more evidence about two species sharing a common ancestor?
Homologous
How is molecular biology used to determine relationships among species?
By comparing shared genes or proteins in different species to see how closely they match. The closer the match, the more likely they're related.
How does the fossil record provide evidence for common ancestry?