Mrs. Bush’s cat has fleas. A flea is a parasite that gets its energy from Dante’s blood. How are the flea and the cat affected in this relationship?

One organism is helped and another organism is harmed.

Both organisms are not affected.

One organism is helped and one organism is not effected.

Which is an example of commensalism?

One kind of organism is being helped, but the other one is not harmed or helped.

Two different kinds of organisms harming each other.

Two different kinds of organisms are neither helping nor harming each other.

One kind of organism is being helped, but the other is harmed.

Which interaction benefits both organisms?

A tapeworm living inside an animal

Tapeworms live in the intestines of dogs and absorb nutrients from food the dog eats. Which best describes the outcome of this relationship?

The dog becomes ill, and the tapeworm benefits.

The dog and tapeworm both become ill.

The tapeworm and dog helpe ach other survive.

The tapeworm helps the dog survive.

Which event is the best example of competition between species in a pond?

dragonflies landing on lily pads

lizards and snakes lying in the sun

An energy pyramid represents what?

The amount of energy available to the next 'feeder' in a food web.

How much sunlight is available for the ecosystem to use.

How much energy a particular organism needs.

How much energy is needed to build a pyramid.

Why is there a limited amount of energy that can be passed on to the next feeding level?

Organisms use some of the energy they get from eating.

There is never enough sunlight available.

Some ecosystems have limited resources.

All the energy is available to be passed on.

Why might an organism have more than one arrow coming from them in a food web?

More than one organism may eat them.

They may eat more than one other organism.

This organism gets its energy from multiple sources.

They have no resources available to them.

Ecological Relationships

Authored by Dylan Thomson

Science

7th Grade

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MULTIPLE CHOICE QUESTION

Mutualism

Competition

Parasitsm

Commensalism

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

A relationship between two organisms in which both organisms benefit.

Mutualism

Competition

Parasitsm

Commensalism

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Ecological Relationships

A tick and a dog have this type of relationship.

A tapeworm and a cat have this type of relationship.

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.

Red-billed oxpeckers are birds that feed on parasites found on an impala. The impala gets rid of parasites and the red-billed oxpeckers get a yummy dinner. This is an example of _______.

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

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

A relationship between two organisms in which both organisms benefit.

Barnacles create home sites by attaching themselves to whales. This neither harms nor benefits the whales.

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

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.

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