Question

lichen is a living partnership between a fungus and an algae and this partnership is beneficial for both

Answer 1

The term "ultrasonic" applied to sound refers to anything above the frequencies of audible sound, and nominally includes anything over 20,000 Hz. Frequencies used for medical diagnostic ultrasound scans extend to 10 MHz and beyond.

Answer 2

Answer:

It is because the fungus absorbs water and provides shealter.The alga prepares food by photosynthesis,from this way linchen is a living partnership between a fungus and an algae and this partnership is beneficial to both of them.

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