A relationship between organisms of different species where one organism benefits and the other is harmed

An interaction between organisms or species that is helpful to one but neither helpful nor harmful to the other

An organism that makes its own food

A tapeworm and a cat have this type of relationship.

What type of symbiosis?  Hummingbirds feed on nectar from flowers.  The flowers are pollinated by hummingbirds as they move from flower to flower.

Mistletoe extracts water and nutrients from the spruce tree to the tree's detriment (harm). 

In the energy pyramid here, which organisms have the most energy available?

If there is 1000 Kcal available in the producers in trophic level 1, how much energy is available in the herbivores in trophic level 2?

If these organisms were arranged in a food pyramid, which organism would have the least amount of total energy available?

All energy transformations in an ecosystem begin with

What percentage of energy is passed on to each tropic level?

At which level does the path of nutrients start?

Cattle egrets forage (feed) in fields among cattle. The egret gets easy access to flying insects stirred up by the cattle, and the cattle don't care if they are there or not.

What type of symbiosis?  Hummingbirds feed on nectar from flowers.  The flowers are pollinated by hummingbirds as they move from flower to flower.

__________ is an organism that eats BOTH plants and animals for energy.

Which of the following would be the most likely effect, if there were a sudden increase in the cricket population?