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

Yucca flowers are pollinated by yucca moths. The moths lay their eggs in the flowers where the larvae hatch and eat some of the developing seeds. Both species benefit.

Hermit crabs live in shells made and then abandoned by snails. This neither harms nor benefits the snails.

In the context of PERMA, what does 'R' emphasize?

Which of the following best describes a mutualistic relationship?

What is a direct relationship?

One way to keep your relationships healthy is to...

As buffalos walk through grass, insects become active and are seen and eaten by cowbirds. This neither harms nor benefits the buffalo.

A flea feeds on a mouse's blood to the mouse's harm.

Wrasse fish feed on the parasites found on the black sea bass's body. Both species benefit.

Ticks feed on deer blood to the deer's detriment.

Honey guide birds alerts and directs badgers to bee hives. The badgers then expose the hives and feed on the honey first. Then the honey guide bird eats. Both species benefit.

The otters help the kelp by eating the sea urchins which consume the kelp endangering it. The kelp provides an anchor for the otter to wrap around themselves while they sleep.

Cattle egrets are birds that forage in fields among cattle. The egrets get easy access to food and the cattle don't care if they are there or not.

A relationship between two organisms in which one organism benefits and the other is unharmed.

Clown fish live among anemones, acting as a lure for the sea anemone's prey. The clown fish gets protection and shelter from the anemone.

This is an example of which type of symbiosis?

Types of orchids grow high on the branches of the tall kapok trees of the jungle. This adaptation allows the orchid to get to the light. The tree is not harmed.

Silverfish live and hunt with army ants. They share the prey. They neither help nor harm the ants.

A relationship between two species where one benefits while the other is harmed.

A relationship between two organisms in which both organisms benefit.

In a symbiotic relationship where one organism benefits and the other is neither helped nor harmed, what is this relationship called?

Which of the following is an example of a parasitic relationship?

In an ecosystem, what type of relationship exists between a predator and its prey?

Which of the following best describes a mutualistic relationship?