A teacher was explaining about a constant physical contact involving almost equal physiological interdependence in two different thalloid forms. He was trying to explain
A
Mycorrhizal association
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B
Establishment of heterothallism
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C
Operation of heterothallism
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D
Advent of lichen formation
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Solution
The correct option is C Advent of lichen formation Two mutually benefited organisms that grow together are called as symbionts and this mutual relationship is known as symbiosis. Lichen is an example of a symbiotic relationship between algae and plants. The algae partner is photosynthetic while the fungal partner is reproductive. Both the partners are in constant physical contact involving almost equal physiological interdependence in two different thalloid forms.