Mystery fossils

nobody cares abt this

Environmental Changes

How an area differs throughout the years, water amounts, temperature, plants, animals and climate

Embryo similarities

Beginning of all vertebrate animals, they all look the same: tails, pouches, eye buds, webbed hands/feet

Mystery fossil

Is the ancestor of the whale, it was semi aquatic, nostrils on top of head, breathed air, had walking /swimming legs

Relative dating

The oldest layer is the deepest and the youngest is on the surface

fore limb/hand bones of vertebrate

All vertebrates show similar hand /forelimb bones that vary in size and shape

Parent Rock

This is the original rock the most is found in the youngest layer

evolutionary tree

A structure that shows the evolutionary relationships thought to exist among groups of organisms

Trait

A characteristic that an organism can pass on to its offspring through its genes.

homologous structure

Structure that have same form of but not same function

Analagous Structures

Similar function but different structure - does not show common ancestry - Ex: butterfly wing and bat wing)

Charles Darwin

English natural scientist who formulated a theory of evolution by natural selection (1809-1882)

ancestor

A relative who lived in the past

Cladogram

What is the form we use to show common characteristics and also ways species changed?

Evolution

Change in a kind of organism over time; process by which modern organisms have descended from ancient organisms.

mutation

a random error in gene replication that leads to a change

Adaptation

A trait that helps an organism survive and reproduce

fossil

A trace of an ancient organism that has been preserved in rock.

paleontology

the study of fossils

Fossil Record

The information provided by all of the discovered fossils throughout Earth's history

Adaption

Any heritable characteristic that increases an organism's ability to survive and reproduce in an environment

Vestigial Structures

A structure or characteristic that has little or no importance to organism, but remain from an ancestor.

**Embryo similarities**

**Beginning of all vertebrate animals, they all look the same: tails, pouches, eye buds, webbed hands/feet**

DNA

**All organisms have chromosomes that are found in the nucleus and make all organisms unique**

**Sedimentary**

**All fossils are found in this type of rocks**

**in the youngest rock**

**The most parent rock in radioactive dating is found............**

**bones are similar in number and shape but diff in size**

**How does the bone structure of vertebrae hands show a common ancestor?**

**in the deepest horizonal layer**

In relative dating where would we find the oldest layer?

**some of the oldest fossil found were marine animals**

How do we know that the desert, Wadi al Hitan was once an aquatic/water environment?

**they have hip joints, have lungs, fins have hand bones**

**How do we know whales ancestors were land mammals?**

**All the parts fit together like a puzzle and they are still moving**

**How do we know that Pangea existed?**