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Why is diffusion insufficient meet the oxygen requirements of multicellular organisms like humans?
In single-celled organisms the entire surface of the organisms is in contact with the environments for the diffusion of substances. In multi-cellular organisms all the cells may not be in direct contact with the surrounding environment. So simple diffusion will not meet the requirements of all the cells.
Do all living things on earth have at least 25 protons in their atoms?
No. Living things are over 90% carbon, oxygen, hydrogen, and nitrogen. Carbon has 6 protons, nitrogen has 7, hydrogen has 1, and oxygen has 8. Other elements found in the body, such as calcium, potassium, and phosphorus, also have less than 25 protons. Iron, used to carry oxygen in the blood has 26. However, single-celled organisms do not contain iron and all of their atoms have less than 25 protons.
Why don't bacteria need nitrogen?
Bacteria are extremely simple organisms. Most bacteria are a single cell, and are supported perfectly by sunlight alone. Some kinds of bacteria can live deep underwater, or encased in thousands of tons of rock. Some can even live in space. Overall bacteria do not need oxygen/nitrogen for any reason, because there body's do not need it to function, they are just to small and simple.
Does oxygen occur naturally in its pure form?
It depends on what you mean by the pure form of Oxygen. Air is about 20% Oxygen. It comes as a molecule of two atoms of oxygen tied together. The chemical formula is O₂ but a single oxygen would be O. A single oxygen molecule does not exist in nature.
How many electrons are in oxygen?
Oxygen is a non metal element. There are 8 electrons in a single atom.
How do single-celled pond organisms get the oxygen they need to survive?
ask your mom
Is bacteria single or multicellular?
Usually Bacteria is unicellular, but in some cases multicellular.
The simple single-celled organisms that live in your intestines are classified in the domain?
it is eubacteria
Bacteria are single celled organisms?
yes bacteria is a single celled organisms.
What kingdom is most single-celled organisms?
Kingdom Protista consists mostly of single-celled and simple multicelluular organisms.
What is a group of single celled organisms?
what is the group of mainly single celled organisms called
Are bacteria considered simple organisms why or why not?
Bacteria are considered simple organisms because they are single celled, they do not have a nucleus with a membrane and no membrane-bound organelles.
Generally are single celled organisms?
Amoebas are single celled organisms. They do not have any particular shape. Another group of single-celled organisms like amoebas are protists.
Is bacteria single-celled or multi-celled?
Bacteria are single-celled organisms.
What organisms first introduced oxygen into earth's atmosphere?
Colonies of algae-like single celled organisms called stromatolites
Are single celled animals and single celled organisms different?
"unicellular"
Are there more single-celled or multi-celled organisms on earth?
multi-celled organisms have more than 1 cell.But a singe-celled organism does not.
