Question

Which of the following is likely to be found in the deepest waters?

• A. Red algae
• B. Green algae
• C. Brown algae
• D. All of the above

Answer 1

The correct option is A Red algae

• For sustaining life in the deepest waters, energy is necessary. Algae synthesize their food by using solar energy. At the bottom of deep water bodies, only high energy components of the solar spectrum are able to reach.
• The blue and green light components have short wavelengths and hence high energy. So, blue-green light reaches the bottom. This blue-green light is absorbed by the pigment phycoerythrin which is present in red algae. Hence, red algae is likely to be found in the deepest waters.

So, the correct answer is 'Red algae'.