Read the following statements and choose the correct option.
(i) Light is essential for life to exist on the earth.
(ii) Many species of small plants under the canopy to tall trees in forest show optimal use of available light due to having large sized antenna and higher number of thylakoids.
(iii) UV rays are not harmful to many organisms.
(iv) Photoperiodic requirement is essential for many plants for flowering .
(v) Red algae can live in deeper water of sea because of having pigment, phycoerythrin.
Text Solution
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(i) (True): Light drives photosynthesis, supporting almost all life.
(ii) (True): Under-canopy plants adapt to low light with more thylakoids.
(iii) (False): UV rays are highly harmful and damage DNA.
(iv) (True): Day length (photoperiod) triggers flowering in many plants.
(v) (True): Phycoerythrin lets red algae absorb deep-penetrating blue light.
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