The bacterium Escherichia coli
Answer:
4 Charles Darwin was not able to explain the variation
Answer:
Its Located in the Plant Cell called Vacuole
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