ERTH 2403 Lecture Notes - Lecture 11: Hemoglobin, Saccopharyngiformes, Red
2 Sep 2016
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Document Summary
Researchers have discovered an essential relationship, evolved during the late cretaceous, that is responsible for nitrogen fixation in the oceans. Single-celled algae host a cyanobacterium, which fixes nitrogen. What is an adaptation: a trait with a current functional role in the life of an organism that is maintained and evolved by means of natural selection, the result of natural selection acting upon heritable variation. Temperature: the issue temperature vary by depth position on the earth and seasonally, the solution be happy with the current condition or internal thermostats. Light: the issue light varies according to sun"s angle(latitude), depth and suspended particles, the solution. Silica spicules to guide light to where it needs to go. Create your own light and bioluminescence & photophores. Sound: the issue travelling through a liquid medium, the solution lateral line system for sound and sonar (e. g. whales) Pressure & buoyancy: pressure increases with depth, solution. Water moves from higher concentration to lower concentrations.
