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"A world without photosynthesis", "photosynthesis would still have been impossible for an entire year" Clearly, photosynthesis did survive in some capacity. N
by julienchastang 9y ago
"A world without photosynthesis", "photosynthesis would still have been impossible for an entire year"
Clearly, photosynthesis did survive in some capacity. No? Life did not re-evolve photosynthesis in the last 66 million years.
- Xeoncross 9y agoSeeds can germinate after much longer than a year: https://en.wikipedia.org/wiki/Oldest_viable_seed https://en.wikipedia.org/wiki/Oldest_viable_seed
- blacksmith_tb 9y ago"Some seeds can live for a long time before germination, while others can only survive for a short period after dispersal before they die."[1] I wasn't suggesting all seeds would fail to germinate after two years, just that some would, and that change would be noticeable in the fossil record. 1: https://en.wikipedia.org/wiki/Seed#Germination https://en.wikipedia.org/wiki/Seed#Germination
- Xeoncross 9y agoOld seeds had much higher germination rate according to the linked wikipedia article. In addition, cold storage increases the life of seeds. I doubt you would see much of anything in the fossil record.
- dasil003 9y agoAll photosynthesizing plants could die and then re-sprout from seeds without extinction.
- pilom 9y agoSeeds can remain viable for significantly longer than a year. My guess is that as it got significantly colder for that same time period, most seeds were too cold to grow until it warmed up after the soot left the atmosphere.
- mrfusion 9y agoDeciduous trees would just treat it as a long winter.