What is the original source of almost all energy in most ecosystems?
carbohydrates
sunlight
water
carbon
3. Multiple Choice
30 seconds
1 pt
An organism that produces its own food supply from inorganic compounds is called a(an)
heterotroph
consumer
detritivore
autotroph
4. Multiple Choice
30 seconds
1 pt
What is an ecological model of the relationships that form a network of complex interactions among organisms in a community from producers to decomposers?
food web
an ecosystem
food chain
a population
5. Multiple Choice
30 seconds
1 pt
What is the term for each step in the transfer of energy and matter within a biological community?
energy path
food web
trophic level
food pyramid
6. Multiple Choice
30 seconds
1 pt
Autotrophs make up the _______ level in all ecosystems.
First
Second
Third
Fourth
7. Multiple Choice
30 seconds
1 pt
which symbiosis is this
parasitism
mutualism
commensalism
nonalism
8. Multiple Choice
30 seconds
1 pt
This is an image of a _________.
consumer
scavenger
decomposer
producer
9. Multiple Choice
30 seconds
1 pt
symbiotic relationship in which both organisms benefit
competition
Mutualism
nitrogen fixation
energy pyramid
10. Multiple Choice
30 seconds
1 pt
A living relationship between two species in which one organism is harmed is called...
mutualism
commensalism
parasitism
niche
11. Multiple Choice
30 seconds
1 pt
The energy at each trophic level in the pryamid of energy decreases by a factor of ____.