Ecology+Evolution
8 important questions on Ecology+Evolution
WHat is a population?
A group of organisms of the same species which live in the same area at the same time
How do consumer obtain there energy?
- Ingest other organisms to obtain organic material for respiration to release energy
How do detrivores obtain there energy?
- Ingest non-living organic matter e.g.. dead leaves, carcasses
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How do saprotrophs obtain there energy?
- Secrete digestive enzyme outside of their body
- Absorb the products of digestion
- IMPORTANT in decomposing dead organic material
- eg fungi + bacteria
What are food webs?
- They illustrate the more complex interactions between multiple food chains in a community
- On type of producer can be capable of supporting many different food chains
- UNREALISTIC --> only show linear relationship
What are trophic levels?
- Refers to the energy level of an organism in a food chain
- Producers occupy trophic level 1
- Primary consumer occupy trophic leevl 2
- Organisms can occupy more than one trophic level
Light energy in an ecosystem
- Initial energy source
- light energy is converted into chemical energy by autotrophs and flows through the ecosystem
Energy flow through an ecosystem
- Energy CANNOT be recycled but can be transformed
- ecosystem require constant input of light energy
- all energy is EVENTUALLY lost from ecosystems as heat released from respiration
The question on the page originate from the summary of the following study material:
- A unique study and practice tool
- Never study anything twice again
- Get the grades you hope for
- 100% sure, 100% understanding
