Definition 1
Any body shape, body process, or behavior that helps an organism survive in its environment and carry out its life processes.
adaptation
single species from which different species arise
common ancestor
How many species of life are there?
dozens
hundreds
thousands
millions
Why do tropical rainforests have a high biodiversity?
food, water, and shelter support a very large number of species.
all of the fossils that scientists have recovered from the ground.
Fossil Record
the measure if the number of different species in an area
biodiversity
Tell me an example of an adaptation?
What is an example of a behavioral adaptation?
The migration of a bird.
the record of life on Earth.
Geologic Time Scale
a remain or trace of ancient life
fossil
True or false
Natural selection is the main way changes happen in a population.
True
Geographic isolation for a long period of time can lead to the creation of new _______.
species
Large-scale disappearance of many species within a short time.
Mass Extinction
eras
Which is the longest PERIOD of time between a century, the geologic time scale, a period, and an era?
the geologic time scale
What causes organisms to adapt?
their environment.
the process in which organisms best suited for the environment survive, reproduce, and pass their traits on to their offspring.
natural selection
the smaller subdivisions of the geologic time scale
periods
According to our book, which is true of mass extinctions?
There has only been one.
They no longer occur.
The largest one happened 220 million years ago.
One may have been caused by natural selection.
The largest one happened 220 million years ago.
The fossil record includes _____?
only the fossils scientists have recovered.