Biology Questions and Answers
carbon dioxide and light to synthesize
organic material ahave been the first photosyntppeared. These wouldhetic
beings (that were also fermenting
beings since thoxygen). ere was no abundance of
Since photosynthesis isreleases molecular oxygen, with th a reaction thate
emergence of fermenting autotrophs
this gas becamorganisms then developed aerobice available. Some (^)
respiration using O 2 , a highly efficient
method to produce energy.
- Why is it more probable
that the photosynthetic
prokaryotes appeared before
the aerobic eukaryotes?
It is more probable that photosynthetic
prokaryotes aaerobic eukaryotes bppeared before theecause witho (^) ut
photosynthesis the earth's atmosphere
would not be enriched oxygen, and without oxygen thewith molecular
existence opossible. f aerobic beings would not be
- What is an argument that
shows that the emergence of
photosynthetic beings was
crucial for life to reach the
marine surface and later the
dry land?
Ultravioletnot disallowe radiation fd to reach throm the surface ofe sun was
the primitivedevelopment of life on dry land or even earth. Therefore the (^)
near the aquatic surface was
impracticable. Probably the first living
beings lived submto avoid destruction berged in deep watery solar radiation. (^)
Only after the appearance of
photosynthfilling of the atmosphetic beings anere with oxyd the latergen (^)
released by them the formation of the
atmospultraviolet raheric ozdiation was pone layer that filtersossible.
http://www.biology-questions-and-answers.com