Fossils
An impression of an organism in a rock
mold
This is the chart that divides time
geologic time scale
This scientist was a naturalist who theorized evolution by natural selection.
Charles Darwin
What are the three types of adaptations?
behavioral
functional
A human arm and bats wing are what type of structures?
homologous
fossils that show the EVIDENCE OF ACTIVITY of an organism
trace fossils
Time is divided into 4 eons and 4 __________.
eras
What are slight differences that are inherited between members of a species
variations
A giraffes long neck is what type of adaptation?
structural
structures that have similar functions but different structures are what type of structures
analogous
The process of an organisms original material hardening into rock
mineralization
The geologic time scale suggests there have been ___ mass extinction events.
5
When a population reproduces, variations allow a species to _____________ better in their environment than other members of the SAME species.
compete
Gazelle move in herds. This is what type of adaptation?
Behavioral
body parts that have lost their original function are
vestigial structures
How fossils are dated in undisturbed sedimentary rock layers.
relative-age dating
suddenly and gradually
Natural selection allows an organism to do what 3 things better than all other organisms of that species
1. Breed more
2. Live longer
3. Compete better for resources
A bearded dragon will go into brumation whenever temperatures decrease and there is a lack of resources. What type of adaptation is this?
functional
pharyngeal pouches
Fossils that lived for a short period of time, was abundant on Earth, were found in many areas (widespread).
index fossils
write the number 200,000,000 in scientific notation
2.0x108
The accumulation of many similar variations is called
adaptations
What is the difference between mimicry and camouflages?
Mimicry allows an organism to imitate another organism.
Camouflage allows an organism to blend in with its environment.
What determines how closely related two species are?
How recently they shared a common ancestor.