Bees and flowering plants have a mutualistic relationship where both źspecies benefit. Flowers provide bees with nectar and pollen, which worker bees collect to feed their entire colonies. Bees provide flowers with the means to reproduce, by spreading pollen from flower to flower in a process called pollination
Birds nesting in trees provide an example of a commensal relationship. The tree is not harmed by the presence of the nest among its branches. ... The bird, on the other hand, benefits greatly. If the bird had to nest in the open, its eggs and young would be vulnerable to predators.
Simple feeding by aphids leads to withdrawal of large quantities of plant sap leading to local chlorosis, weakening of the plant, and increase in susceptibility to other insects or pathogens.
Human - snake interactions has always been associated with different outcomes. Human snake encounters with negative results such as animal death, habitat destruction, injuries to people, injuries to wildlife and the like are common
It's a symbiotic relationship. The fish provide nutrients from their waste products and the plants filter the water before it's returned to the tank. Basically, bacteria break down the toxic ammonia in fish waste turning it into nitrogen, one of the nutrients for growing plants
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