The truth about intercellular signals are nucleus which opens up on an ion-linked channel.
Intercellular signals mediates and ionizes radiation which is being induced by stander effects.
Inorder to get to know more about intercellular signal we have to identify the transducers, receptors and the ligands.
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Biotic means that something is living, and abiotic means something isn't alive. Paper, since it came from trees, a living thing, is a biotic factor.
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D) Gases such as carbon dioxide and methane
And the more of these from gas emissions, etc. then the more global warming.
FYI: ozone helps to blocks cosmic gamma rays from reaching earth
Answer:
C:each organisms has a way to reproduce
Explanation:
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I believe animals that possess homologous structures probably evolved from the same ancestor. Homologous structures are similar because of common ancestry. A homologous structure is an example of an organ or bone that appears in different animals, underlining anatomical commonalities demonstrating descent from a common ancestor.