Ecology

The original source of all energy on earth:

• Chemical energy in food

• Light energy from the sun

• Splitting of water molecules

• Nutrients from soil

Refer to the picture - the algae represent what?

• Producer

• Consumer

• Parasite

• Decomposer

The diagram, which demonstrates the way energy moves through an ecosystem is know as a...

• Habitat

• Food net

• Food chain

• Food web

In any environment, non-living factors such as climate, soil acidity, precipitation, and available nutrients are called

• Abiotic Factors

• Niche

• Biotic Factors

• Habitat Factors

What effect will a decreasing population of producers have on the ecosystem?

• Stability will not be affected

• Ecosystem will become more unstable because fewer organisms are at the base of the food chain

• Ecosystem becomes more stable because there are more available food sources

• The herbivore population would increase dramatically

An animal or plant that is taken out of its natural habitat and placed in a completely new one can become an invasive species - its population can grow out of control. How will the invasive species affect the ecosystem?

• No change in the ecosystem

• Invasive species will compete with native species for limited resources

• Invasive species will NOT compete for limited resoures

• Native species populations will increase

Organisms that have to to eat other organisms for energy

• Consumer

• Heterotroph

• Decomposer

• Producer

Organisms that capture energy from the sun during photosynthesis

• Consumer

• Heterotroph

• Decomposer

• Producer

What term is used for each step in the transfer of energy and matter within a food web?

• Energy Path

• Food Chain

• Trophic Level

• Food Pyramid

Only 10% of the energy stored in an organisms can be passed on to the next trophic level. Of the remaining energy, some of its used for the organism’s life processes, and the rest is

• Used in reproduction

• Stored as Fat

• Stored in Body Tissue

• Lost as heat