Tropism
It is a biological phenomenon, indicating growth or turning movement of a biological organism. This is usually a plant in response to the environmental stimulus. This response is dependent on the direction of the stimulus. The stimulus must be perceived first, followed by movement towards or away to the stimulus. There are various types of tropism which are chemotropism, exotropism, geotropism and electrotropism.
B 5 years it takes 5 years before symptoms to appear
Answer:
the answer is 21 :)
<em>hope this helps</em> ^^
Explanation:
C. Semi-Conservative
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