| Which of the following statement (s) is /are incorrect? |
| [A] light is essential for life to exist on the earth. |
| [B] Many species of small plant under the canopy of tall trees in forest show optimal use of available light due to having large sized antenna and higher number of thylakoids. |
| [C] UV-rays is not harmful for many organisms. |
| [D] Photoperiodic requirement is not essential for many plants for flowering. |
| [E] Red algae can live in deeper water of sea because of having pigments, phycoerythrin. |
A) Only [A]
B) Only [B]
C) Only [C]
D) [D] and [E]
Correct Answer: C
Solution :
[c] UV rays are the harmful radiations. UV rays causes premature aging of the skin, skin cancer and the other skin problems. UV rays that reaches the earth's surface is in wavelength between 290 to 400 nm which is shorter the wavelength of visible light i.e., 400 to 700 nm. The shorter the wavelength, the more energetic the radiation and the greater the potential for harm. UV rays are harmful for all organisms.
You need to login to perform this action.
You will be redirected in
3 sec
