Download between two or more different species

Biological Changes and Interdependence Review Sheet
Symbiosis: A ____________________ ____________________ between
two or more different species.
The three types are:
___________________ : Both organisms benefit
___________________ : One benefits, other is harmed
___________________ : One benefits, other is unaffected
____________ ______________: A historical sequence of life
provided by fossils is known as this.

It gives us clues about changes in the: ____________________
and ___________________________.

It fossils are found in deeper layers they are _____________
like current organisms today.

Why are there gaps in the fossil record?

______________ are things that have helped organisms survive
over time.

Why do some of these change over time?
__________________ ________________ is the process in which
organisms best fit for their environment will survive.
Define abiotic factor –
Define biotic factor –
In a food web:
What is the primary source of energy?
Where does that energy travel to?
__________________ : Produces its own food
__________________ : Eats other organisms (plants/animals)
__________________ : Eats dead organisms
__________________ : Breaks down remains of dead organisms
A niche is an organism’s _____________ for the ecosystem.