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A mosquito feeding off of a human.
A bird lives in a tree.
Bacteria in our stomach.
Barnacles living on a whale
A mountain lion eats a rabbit.
A lizards catches and eats an insect.
A flea feeds on a dog.
A cowbird eats the ticks off of a cow’s back. What is the relationship between the cowbird and the cow?
Mistletoe lives on and feeds off of a tree. The tree is harmed, but not immediately.
Bacteria living at the roots of a tree: the tree gains nutrients, but the bacteria gain nothing from the tree.
A cow eats grass.
Lichen is a protist and an algae living together. The algae retains moisture that both need to live. The protist produces nutrients for both.