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Are substances that test positive with the Ames test necessarily carciongenic in humans?
The substances that are test positive with Ames test may or may not be carcinogenic for humans. Similarly, some substances that cause cancer in laboratory animals do not give a positive result Ames test. It is not possible to decide the carcinogenicity of any substances only depending on the Ames test.
What else can I help you with?
Are all radioactive substances harmful to humans?
just some
How do fossils give evidence of biological evolution?
By looking at the fossils and seeing how they change over time.
Does fecal matter make energy?
Yes, but if humans eat it it will not make energy. Some substances (like fecal matter) are only meant for decomposers to eat. If humans eat it it will not do anything beneficial. Fecal matter can give off methane gas when it decomposes, and the methane can be used as fuel. Frontiersmen burned buffalo chips for energy.
Why did Charles Darwin think humans were apes?
Darwin was the father of natural selection. He believed in evolution. But he never said he believed humans were apes or that they necessarily used to be apes. He never applied his theory to humans. Darwin did think that we were apes he had all of his therories and other research written and others found it
Why are organic substances important?
Because our body use them in all the biochemicals reactions that allow us to live. They are necessary, some in small doses some in bigger. That is why we separate them in macronutrients (inorganic molecules used in big quantity) and micronutrients (inorganic molecules used in small quantities)"
Robots can take the place of humans in handling dangerous substances.?
Robots can take place of humans in handling dangerous substances
How do humans help destroy the ozone?
Humans created CFC which are ozone depleting substances. These substances are the ones that react with ozone and deplete it.
Do elephants have positive effects on humans?
no
Are all radioactive substances harmful to humans?
just some
What is a positive effect humans have on the tundra?
boloni
What are positive effects that humans do to penguins?
We entertain them.
Have humans had any positive inpact on estuaries?
humans impact estuaries by forming bays, inlets, and harbors.
What is the positive effects cars have on humans?
they can move humans around quicker than walking
Are dragonflies friendly?
Dragonflies are not necessarily friendly or mean. They will not attack humans but they also will not play with humans. They will fly away if you swat your hand at them.
What substances are involved in controlling the production of sperm and eggs in humans?
hormones
What substances involved in controlling the production of sperm and eggs in humans?
hormones
What is a noun sentence for nontoxic?
"Nontoxic substances are safe for humans and animals."
