Ecosystems
What is the ultimate source of energy in an ecosystem?
the sun
What 2 symbiotic interactions have the same symbols?
predation and parasitism
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In a food web, which way does the arrow point going between two organisms
- points toward the animal that does the eating
What is an example of a physical adaption?
Fur color, fur thickness, beak size, shape of ears, camouflage, etc.
what is an example of a both a biotic factor and an abiotic factor
anything living (grass, animals, trees, insects)
anything nonliving (water, air, temperature, rocks)
Hyenas will travel behind lions and eat whatever meat is left over after the lion leaves. The lion is not affected. What is the name of this interaction and the symbols?
Commensalism
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What is a producer?
Producers are living things that create their own food.
Two bald eagles are diving for the same mouse on the ground. What type of competition is this?
Intraspecific competition
Why are invasive species dangerous?
They don't have any natural predators so they take over ecosystems, steal resources, etc.
What term matches this definition: the interactions between and among organisms in their environment
symbiotic interactions
What do decomposers do?
list 2 out of the 4 selective pressures that affect natural selection
predation, competition, sexual selection (female picks male with advantageous traits), physiological stress
In an ecosystem, which level of organisms will contain the most biomass?
Producers - there are more plants than top predators
What is the role of a foundation species in an ecosystem?
- They create habitats for organisms to live in
- EX: beavers build dams
Label a food web with 4 different levels of organisms.
producer, primary consumer, secondary consumer, tertiary consumer
Why do adaptations help a species?