Is grass poking through a sidewalk crack primary or secondary succession? Why?

Primary and secondary succession differ because primary is where no soil or organisms exist, but secondary succession is where soil and organisms exist. ... Grass poking through a sidewalk crack would be considered secondary succession because before the sidewalk was built, an ecosystem was there.

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Hope it helps

due to the fact that it skipped a generation we can tell it is definitely not a dominant trait, therefore it must be recessive. i think this is right let me know!

explanation:

one part of the electromagnetic spectrum that arrives on earth as solar radiation from the sun is the visible spectrum. wavelengths of the visible spectrum combine to form what we refer to as

answer - d) ultraviolet radiation.

violet /   380–450 nm / 668–789 thz

violet is number 1 in the chart of visible light.