Question

1.. now is ozone formed in the upper atmosphere? Why is the damage of ozone layer a cause of
concern to us? State a cause of this damage.
2. Suggest a proof that even unicellular organisms like Amoeba respond to stimuli. Justify giving
two examples that even plants respond to stimuli.
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Answer 1

Answer:

1.....Because the harmful ultraviolet radiation form the sun reache to the earth which can damage the organism.

Ozone layer depletion causes increased UV radiation levels at the Earth's surface, which is damaging to human health. Negative effects include increases in certain types of skin cancers, eye cataracts and immune deficiency disorders.

2.Some of the bacteria can detect specific chemicals, like sugar, and when they sense it, they move towards them. Photosynthetic protists, such as euglena, can detect light using special sensors. All organisms are able to sense their environment in unique ways and respond to it.

example tropism in plant is phototropism, plant grow toward the light

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