Question

Deep in the ocean, sunlight can hardly reach, yet plants such as brown and red algae are found here. How do you think they are able to synthesise their food?

Answer 1

Answer:

Deep in the ocean light can hardly reach, yet there are plants like brown and red algae found here. ... They receive oxygen from water and at this depth algae can access sunlight. All algae contain chlorophyll. The pigments of red and brown algae mask the predominant green photosynthetic pigments.

                             Hope it helps u!!!!

Answer 2

Answer:

Brown and red algae are only found as deep as enough light can penetrate for photosynthesis, which is not that deep when you consider how deep the ocean really is.  Some have special adaptions to low light like iridescence.  They also tend to grow slowly. Less photosynthesis means less energy and a slower growth rate.  On land, most plants that are adapted to very low light are also slow growers for the same reason, and if you put them in bright sun, they die easily.