Vitamin B12 deficiencies can lead to megaloblastic anemia, a condition where the bone marrow produces large abnormally shaped red blood cells that do not function properly. Dementia, paranoia, depression, and behavioral changes can result from a vitamin B12 deficiency. Neurological damage sometimes cannot be reversed
Prokaryotic cells do not have membrane bound organelles and eukaryotic cells do have membrane bound organelles
Decreases... barely any energy is transferred to the next level and most of it is lost through heat
A) Natural selection
Hope this helps I took bio ;)
Cyanobacteria are primitive organisms where chloroplasts are believed to be originated. Now, with the theory of endosymbiosis, this suggests that these organelle from cyanobacteria was engulfed by other organisms which has helped them process light with the help of chloroplasts.
