The reason to why they can't is based their weigh and age the average of blood in an adult is 5 liters same as a child weighing 80 kgs so i think that it would depend on your age and weight
If the ecosystem is balanced then the population would aslo be balanced, IG its the unbalanced ecosystem which leads to unbalanced population and when its unbalanced then we can say which one would be largest and which one smallest..
For decades, scientists believed that the atmosphere of early Earth was highly reduced, meaning that oxygen was greatly limited. Such oxygen-poor conditions would have resulted in an atmosphere filled with noxious methane, carbon monoxide, hydrogen sulfide, and ammonia. As the Earth cooled down, most of the water vapour condensed and formed the oceans.
To date, there remain widely held theories and studies of how life on Earth may have been built out of this deadly atmosphere cocktail.
The perfect word for the blank is decomposers. Fungi and bacteria are decomposers. When plants and animals die, they become food for these organisms. Decomposers convert their food into nutrients like carbon and nitrogen that are released back into the soil, air and water.