Symbiosis and Competition

Two populations with limited resources experience ____________________.

• predation

• parasitism

• competition

• commensalism

Tags

NGSS.MS-LS2-1

People can swallow the eggs of tapeworms in unclean

water or food. Tapeworms can live inside the digestive system of humans. There they grow and feed off the food the person eats. As a result, the person does not receive proper nourishment and becomes ill. What kind of relationship exists between humans and tapeworms?

• predation

• parasitism

• mutualism

• Competition

A plant called the bullhorn acacia has swollen thorns with hollow spaces inside. A certain species

of ant lays eggs inside these thorns. The ants feed from the nectar of the acacia without harming it.

The ants protect the acacia from insects that want to eat its leaves or bark. What type of relationship

exists between the plant and the ants?

• mimicry

• predation

• parasitism

• mutualism

Tags

NGSS.MS-LS2-2

Lichens consist of fungus and alga. The fungus provides a structure on which the alga can grow. The alga produces sugar that the fungus can use. What type of relationship exists between these two organisms?

• predation

• parasitism

• mutualism

• competition

Tags

NGSS.MS-LS2-2

Spanish moss grows on the branches of oak trees. The moss benefits from being up high and the tree is neither helped nor harmed. What type of relationship exists between these organisms?

• parasitism

• mutualism

• competition

• commensalism

The word symbiosis has a Greek origin. What is the MOST LIKELY translation of the word in Greek?

• hiding

• building

• making food

• living together

Many people hang mistletoe over doorways during winter holidays. Mistletoe is a plant that feeds on the branches of oak trees. In so doing, it takes away from the nourishment of the tree. What type of relationship exists between oak trees and mistletoe?

• predation

• parasitism

• mutualism

• competition

The clownfish lives among the tentacles of tropical sea anemones. The stinging tentacles of the anemone protect the clownfish from predators. The mucus on the fish protects it from the tentacles. In turn, the anemone is provided food from the predators that approach the anemone to eat the clownfish. What type of relationship does this example describe?

• parasitism

• mutualism

• competition

• commensalism

Tags

NGSS.MS-LS2-2

A tick lives on the skin of an animal, such as a deer. The tick obtains nourishment from the blood of the animal. What type of relationship exists between the tick and the deer?

• parasitism

• mutualism

• competition

• commensalism

Large reef fish have a mutualistic relationship with cleaner fish. This means that as a result of the relationship ___________________.

• one fish is hurt

• one fish benefits

• both fish benefit

• neither fish benefits

Tags

NGSS.MS-LS2-2