Topic Summaries
Competition
Transport Systems
Blood and heart disease
Stem cells, microscopy, and microorganisms
Transport in cells
Human health and enzymes
Plant transport systems
Pathogens and non-specific immunity
The immune system and drugs
Plant disease and monoclonal antibodies
Photosynthesis and respiration
The nervous system and homeostasis
The brain and the eye
Hormone regulation and waste excretion
Reproductive hormones and plant hormones
Cell division, reproduction, and DNA structure
DNA synthesis and inheritance
Genetic engineering and modification
Evolution and natural selection
Species and classification
Resource cycles and environmental change
Biodiversity and environmental management
Biomass and trophic levels
Food supply and biotechnology
Science skills: Experimental procedures
Science skills: Presenting and using data
Science skills: Measuring results
Transport Systems
Blood and heart disease
Stem cells, microscopy, and microorganisms
Transport in cells
Human health and enzymes
Plant transport systems
Pathogens and non-specific immunity
The immune system and drugs
Plant disease and monoclonal antibodies
Photosynthesis and respiration
The nervous system and homeostasis
The brain and the eye
Hormone regulation and waste excretion
Reproductive hormones and plant hormones
Cell division, reproduction, and DNA structure
DNA synthesis and inheritance
Genetic engineering and modification
Evolution and natural selection
Species and classification
Resource cycles and environmental change
Biodiversity and environmental management
Biomass and trophic levels
Food supply and biotechnology
Science skills: Experimental procedures
Science skills: Presenting and using data
Science skills: Measuring results
- An ecosystem is the interaction of a community of living organisms (biotic) with the non-living (abiotic) parts of their environment.
- To survive and reproduce:
- Organisms require a supply of materials from their surroundings and from the other living organisms there.
- Organisms are adapted to the conditions in which they live.
- Organisms compete with each other for multiple factors: Plants often compete for light, space, and for water and mineral ions from soil.
- Animals often compete for food, mates, and territory.
- Competition between organisms provides a struggle for existence, which drives evolution. Only the organisms best adapted to their environment will survive and reproduce, forming offspring also adapted to their environment. This is known as survival of the fittest.
- Interspecific competition is between different species in a community.
- Intraspecific competition is between organisms of the same species.
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