what is symbiosis in biology

What does symbiosis mean?
What does mutualism mean in symbiosis?
What does commensalism mean in symbiosis?
What does parasitism mean in symbiosis?
What does predation mean in symbiosis?
What does competition mean in symbiosis?


Earth System
Food Waste
Genetic Engineering
Natural Resources
Ocean Acidification
Ozone Depletion
Waste Water

Water Scarcity


What is Predation?

Predation is a symbiotic relationship in which one species survives on costuming the other species. The species that consume or win is the predator and the species that is eaten up is the prey.

We spotted this bird at the beach filling its tummy with some kind of shell organisms. Which one is the predator? Which one is the prey?

There is usually a natural balance in the populations and relationships between predators and prey. More prey means more food for the predators, more energy and therefore more offsprings. More offsprings mean more consumption of the prey, hence reduction in the number of prey populations. Fewer prey populations mean less food for the predator, and hence predator populations suffer or reduce.
In many cases, predatory animals that prey on other animals end the lives of the prey. For example, a lion will hunt for an antelope or another animal and eat them. The predator (lion) benefits while the prey (antelope) is consumed. These predators are known as carnivores, which means meat-eating organisms.
Predators do not always end the lives of their prey. One example of this is known as herbivory. Herbivory involves animals (predators) that eat plants, seeds, fruits or roots (prey). When herbivores eat plants, they often do not kill the plant immediately but may damage them. The plants have a chance to grow back. 
It is possible for some predator species to consume their own species. This behavior is known as cannibalism.

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