Many trees shed their leaves during the autumn months when conditions are not suitable for photosynthesis. Which characteristic
of living things is BEST represented when a tree sheds it leaves during the autumn? A)metabolism B)reproduction C)use of a genetic code D)response to external stimuli
The correct answer is option D) "response to external stimuli".
Explanation:
The phenomenon of tree shedding their leaves during the autumn months is an example of plants response to external stimuli. The deciduous trees start shedding their leaves when light levels and temperatures drop, as a result of the flow of auxin being reduced and the levels of the hormone ethylene rise in the leaves. This process allows the trees to survive winter by conserving resources and protecting from being blown by the winds.
The three reactants used in photosynthesis are water (H2O) carbon dioxide (CO2), and light (sunlight energy). These reactants are used to produce glucose/food for plants and oxygen that is later released.
May not be right, but because of Oxygen and the growing of new skin? We rub our skin without noticing and it will become frail and rub off, creating new skin
