They change the transmission of impulses across synapses
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What are the steps of the carbon cycle?
Plants take in CO2 > plants respire CO2 > Animals eat plants > carbon goes into animals fat & protein > CO2 return when animal respires > burning wood & fuels cause CO2
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what is carbon in the carbon cycle used for in plant bodies?
light intensity, carbon dioxide concentration, temperature
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What is Tropism?
A tropism is a biological phenomenon, indicating growth or turning movement of a biological organism, usually a plant, in response to an environmental stimulus.
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what is auxin?
a plant hormone which causes the elongation of cells in shoots and is involved in regulating plant growth.
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