Element Cycles and Symbiotic Relationships

What type of symbiosis is this?
Snails die and leave behind their shells.Hermit crabs find shells left by snails that have died and move in. 

• commensalism

• mutualism

• parasitism

• predation

Tags

NGSS.MS-LS2-2

In a parasitic relationship, one organism is ___________ and one organism is benefiting. 

• helped

• harmed

• not effected

• happy

A relationship between two organisms in which both organisms benefit.

• competition

• commensalism

• predator/prey

• mutualism

In mutualism

• one species is unaffected

• one species is killed

• both species fight for something

• both species benefit

Barnacles create home sites by attaching themselves to whales. This neither harms nor benefits the whales. What kind of relationship is this?

• mutualism

• commensalism

• parasitism

• predator/prey

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.

• competition

• predator/prey

• commensalism

• mutualism

Tags

NGSS.MS-LS1-4

Nematodes (a round worm) live in plants and gain nourishment from the plant but do not seem to harm it. What type of symbiotic relationship is this?

• predation

• parasitism

• mutualism

• commensalism

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

• Commensalism

• Naturalism

• Mutualism

• Parasitism

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

• mutualism

• commensalism

• parasitism

• competition

In commensalism

• one species is unaffected

• both species fight for something

• one species is killed

• both species benefit