Question

A plant is kept in 300ppm $C{O_2}$ concentration, what will happen to it?
a) Plant will die soon
b) Plant will grow but will not die
c) Plant will show normal photosynthesis
d) Respiration will be greatly decreased

Answer 1

Hint: Plants tend to grow in the presence of carbon dioxide. Their growth stops if the concentration of the carbon dioxide present in the air reduces. Without the presence of carbon dioxide, they aren’t able to do photosynthesis which is important in the production of food material of the plants.

Complete answer:
A plant can be grown in the presence of even a little amount of carbon dioxide present in the atmosphere. Carbon dioxide increased levels in the atmosphere lead to a warmer climate which has led to extra growth of the plant. It has also increased the level of humidity present in the atmosphere. A longer warm period makes the plant require more water to survive. A higher concentration of atmospheric carbon dioxide has led to a boost in the crop yields as it has led to an increase in the photosynthetic activity of the plant. This increased level may be up to 1500- 2000ppm. If the plant is provided with 300ppm of carbon dioxide then also it will survive and grow normally. There won’t be any excess growth present in such plants. And it will show normal photosynthesis during this time of less carbon dioxide.

So, the correct answer is option C.

Note:
Increased levels of carbon dioxide can lead to global warming of the earth. Long periods of warm temperature may increase the overall temperature of the planet hence, affecting the polar ice caps which would melt due to a temperature rise.