bsc-symbiosis

Symbiosis

Network of interactions among organisms on a continuum between beneficial and detrimental effects

Sym= together, bio=life

“Sym” and “bio“ mean?

x

How is symbiosis a driving force for evolution?

Parasitism, Commensalism, Mutualism

Types of Symbiosis

x

Endosymbionts

Endosymbiotic Theory

Theory stating eukaryotic cells originated from a symbiotic relationship between early prokaryotic cells

Theorized one bacteria cell engulfed another bacteria cell, and the engulfed bacteria became the engulfer’s organelles

Explain the Endosymbiotic Theory.

Important bc this created chloroplasts, mitochondria, and nucleus, which have their individual sets of DNA

Why is the Endosymbiotic Theory relevant?

• Mutualistic relationship

• On the root nodules of legumes; mutualistic relationship w/legume plant

• Rhiz undergoes nitrogen fixation which helps the plant grow by replenishing soil w/nit. 

Describe the symbiotic relationship between Rhizobium and Legumes

Helps plants increase nutrient absorption, which increases growth xxxxxxxxxxx

Describe the symbiotic relationship between Mycorrhizae and Plants

Expands the root system of plants 

Describe the symbiotic relationship called “Ectomycorrhiza”