Topic Summaries
Predation
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
- Predation is a biological interaction where one organism (the predator) hunts, kills, and eats another organism (the prey). This is a key factor in controlling population sizes in ecosystems.
- Predators often have adaptations such as sharp teeth, claws, camouflage, speed, and keen senses (e.g. sight, smell) to catch prey effectively, whereas prey will have adaptations to avoid detection or capture such as warning colouration, defensive behaviour, camouflage, or speed.
- Predation helps maintain population balance and biodiversity in ecosystems by preventing any one species from becoming too dominant.
- Predator-prey cycling:
- In a stable community, the numbers of predators and prey rise and fall in interdependent cycles.
- If the number of predators increases, the number of prey decrease after a short lag phase, as more are eaten.
- As the number of prey decrease, the number of predators will decrease as there is less food.
- This then causes the number of prey to increase, resulting in an increase in predators.
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