Download between two or more different species

Biological Changes and Interdependence Review Sheet
Symbiosis: A _close____ __relationship_____ between two or more different
species.
The three types are:
__Mutualism___ : Both organisms benefit
__Parasitism___ : One benefits, other is harmed
___Commensalism___ : One benefits, other is unaffected
__Fossil__ ___record___: A historical sequence of life provided by fossils is
known as this.

It gives us clues about changes in the: __environment_____ and
__organism_________.

It fossils are found in deeper layers they are ___less______ like current
organisms today.

Why are there gaps in the fossil record? Not all fossils have been found.

___Adaptations___ are things that have helped organisms survive over time.
Why do some of these change over time? The environment changes

__Natural _____ _selection____ is the process in which organisms best fit
for their environment will survive.
Define abiotic factor – Nonliving factor in an ecosystem. (sunlight, water, soil,
etc.)
Define biotic factor – Living factor in an ecosystem. (predators, disease, prey,
etc)
In a food web:
What is the primary source of energy? Sunlight
Where does that energy travel to? Through the food web
___Producer_ : Produces its own food
___Consumer___ : Eats other organisms (plants/animals)
___Scavenger__ : Eats dead organisms
___Decomposer_____ : Breaks down remains of dead organisms
A niche is an organism’s __role/job___ for the ecosystem.