bio notes

• Habitat


  Natural home of an organism where it lives and reproduces.
• population


  group of organisms of the same species that live and reproduce in the same habitat.
• community


  collection of organisms of different species living in the same habitat.
• ecosystem 


  community of organisms interacting with one another and their abiotic environment in a habitat.
• increase in population size of prey


  increase in number of predators, bc more food available
• everything around an organism that affects its way of life is called its environment
• the physical environment of a place is determined by some physical factors including light, temperature, water, minerals, acidity and alkalinity, air.
• the biotic environment is made up of all other living things which may influence the life of the organism in any way.
• predators are organisms that hunt other organisms for food.
• preys are organisms that are hunted by other organisms for food.
• mutualism


  2 organisms both benefit from the presence of each other.
• commensalism


  one benefits while the other neither benefits nor is harmed by it.
• parasitism

  2 organisms which one benefits and the other is harmed by it. a host is the organism that is harmed by such a relationship.
• an ecosystem is a community of organisms interacting with one another and their abiotic environment in a habitat.
• adaptive traits are structural or behavioural adaptations that helps organisms to survive in its habitat.
• energy is lost in the form of heat of respiration during respiration/metabolism or faeces.
• short food chains are more efficient in energy transfer, as there is a greater amount of energy available to the final consumer.