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Who are the organisms that feed themselves?
The organisms that are considered self feeders are the autotrophs. They are capable of manufacturing nutritional organic substances from simple inorganic substances.
How do simple unicellular organisms exchange and transport materials within them?
they transport directly with theyre enviroment.
Why must complex muticellular organisms have transport systems?
Large organisms need transport systems to supply all their cells with food, oxygen and other materials.Multi-cellular organisms are too big and not all of their cells have contact with the external environment. All organisms need to exchange substances with their environment - take in needed molecules and get rid of waste. A uni-cellular organism can use the processes of osmosis, diffusion and active transport to transport substances in and out of the organism, which is in this case just one cell. But as organisms increase in size, they need a specialized transport system to exchange substances between the internal environment and the external environment. Interestingly enough, osmosis and diffusion are still the important mechanisms at the cellular level.
Which evolved first - organisms with complex body structures or those with simple body structures?
Complex organisms evolved from simple organisms, so simple organisms evolved first.
What does blood carry - and where does the exchange of substances take place?
blood carry gases like o2,co2...nd the exchange of substances take place in small intestine
Why must organisms exchange substances with their environment?
Because environment is not always steady.😁
Who are the organisms that feed themselves?
The organisms that are considered self feeders are the autotrophs. They are capable of manufacturing nutritional organic substances from simple inorganic substances.
How do simple unicellular organisms exchange and transport materials within them?
they transport directly with theyre enviroment.
Why must complex muticellular organisms have transport systems?
Large organisms need transport systems to supply all their cells with food, oxygen and other materials.Multi-cellular organisms are too big and not all of their cells have contact with the external environment. All organisms need to exchange substances with their environment - take in needed molecules and get rid of waste. A uni-cellular organism can use the processes of osmosis, diffusion and active transport to transport substances in and out of the organism, which is in this case just one cell. But as organisms increase in size, they need a specialized transport system to exchange substances between the internal environment and the external environment. Interestingly enough, osmosis and diffusion are still the important mechanisms at the cellular level.
Which types of organisms produce the biosphere's food supply?
producers or autotrophs and consumers or hetrotrophs
Which evolved first - organisms with complex body structures or those with simple body structures?
Complex organisms evolved from simple organisms, so simple organisms evolved first.
Why are humans the only organisms that produce nonbiodegradable substances?
We are the only organisms that we know of that can understand and apply scientific knowledge to create nonbiodegradable substances.
Explain why large active organisms need special surface for exchange?
large organisms need larger area to exchange more substances.but large organisms have small surface area to volume ratio.this means that the surface is not large enough to enable gases and nutrients at the fast rate needed to keep all the cells alive.thus large organisms need special exchange surfaces to provide the body with the nutrients and gaseous exchange they require.
Why is diffusion insufficient to 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.
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.
What does blood carry - and where does the exchange of substances take place?
blood carry gases like o2,co2...nd the exchange of substances take place in small intestine
What is the Structure Which Ensures Exchange Of Substances Between The Embryonic And Material Blood Circulation?
in mammals, what structure ensures the exchange substances between the embryonic and material blood circulation
