chap 12 Flashcards
what are the different interrelationships between different organisms and how do they affect the organisms.
1) mutualism - all organisms benefit from the relationship
2) predator and prey - predator hunts prey for food
3) parasitism - one organism ( parasite )benefits while the other is harmed ( host )
what is the importance of conserving the environment.
- ensure that the earth’s natural resources do not run out and are available for future use
- reduces negative impacts on the environments and protects the other organisms
what is the different between behavioural and structural adaptations
structural refers to specific body parts or features
behavioural refers to specific habits, actions or reactions
what is the flow of nutrients from producers to consumers?
When producers are eaten by consumers, nutrients in them are transferred to the consumers. When the consumers are eaten by their predators, the nutrients in them are passed on to their predators.
What are the flow of nutrients of decomposers.
Decomposers break down the faeces of organisms and the remains of dead organisms, and return the nutrients in them back to the environment. Thus the flow of nutrients is cyclical.
What is the flow of energy in producers?
Producers absorb light energy from the sun, which is used to produce food through photosynthesis. The food produced stores chemical potential energy.
How do producers and consumers release energy?
Producers respire to release energy required for their life processes, such as transport of substances
Consumers respire to release energy stored in food. They also release energy stored in undigested food, which is passed out as faeces.
How do decomposers release energy?
Decomposers release energy through respiration.
Is the flow of energy and nutrients cyclical?
The flow of nutrients is cyclical while the flow of energy is non-cyclical.
what are the roles of decomposers?
decomposers feed on faeces of organisms and remains of dead organisms to release chemical potential energy
Is the energy in a food chain cyclical?
The flow of energy in a food chain is non-cyclical as heat energy released into the atmosphere by other organisms cannot be reused by producers for photosynthesis.
**what is a community?
Different populations of plants and animals living and interacting in a particular environment make up a community.
what is an ecosystem?
The interactions between a community and its physical environment make up an ecosystem.
what is a population?
organisms of the same kind living in the same environment form a population.
