Question

give the reason
B. Why Rhodophyta appear violet or purple in when grow in shallow water.​

Answer 1

Answer:

Algae

Algae are plantlike organisms that use photosynthesis to produce their own food. While some species of algae resemble plants, they lack the roots, leaves and stems of higher plants. Algae are a kind of primitive plants, and it’s likely that higher plants -- like trees and flowers -- evolved from them. Algae can be small and only seen through a microscope (microalgae) or large enough to see with the naked eye (macroalgae). Macroalgae are colloquially called seaweed.