Symbiotic Relationships in Nature

The video explains symbiosis, a mutual relationship where organisms share resources. It highlights examples like lichens, where algae and fungi coexist, and leguminous plants with rhizobium bacteria, which convert nitrogen for plant use. These relationships illustrate how organisms benefit from each other in nature.

What is the term used to describe the relationship where two organisms live together and help each other?

• Parasitism

• Symbiosis

• Commensalism

• Predation

In a lichen, what role does the alga play?

• Absorbs minerals

• Makes food through photosynthesis

• Provides water

• Provides shelter

What does the fungus provide to the alga in a lichen?

• Food

• Carbon dioxide

• Sunlight

• Shelter, water, and minerals

What is the role of rhizobium bacteria in the roots of leguminous plants?

• Provide food to the plant

• Convert atmospheric nitrogen into nitrates

• Absorb sunlight

• Convert nitrates into nitrogen

How do leguminous plants benefit rhizobium bacteria?

• By providing sunlight

• By providing minerals

• By providing food

• By providing water