Question

give an account of phaeophyceae and rhodophyceae​

Answer 1

Answer:

➡️chlorophyceae

•common name: Green algae

•major pigment: chlorophyll a and b

•stored food: starch

•cell wall: cellulose

•habitat: fresh water , brackish water, salt water.

•flagellar number and position of insertions: 2-8 equal, apical.

➡️phaeophyceae

•common name: brown algae

•major pigment:chlorophyll a and c, fucoxanthin.

•stored food: mannitol and laminarin.

•cell wall: cellulose and algin.

•habitat:fresh water (rare) , brackish water, salt water.

•flagellar number and position of insertions: 2, unequal, lateral.

➡️rhodophyceae

•common name: Red algae

•major pigment:chlorophyll a and d, phycoerythrin.

•stored food: Floridean starch

•cell wall: cellulose, pectin and polysulphate esters.

•habitat: fresh water (some) , brackish water, salt water (most).

•flagellar number and position of insertions: absent..

Answer 2

Answer:

$\huge \tt \blue{Phaeophyceae}$

Phaeophyceae is a class of brown algae which are multicellular. Majority of brown algae are marine organisms. They can be filamentous, frond-like or giant kelps. The thallus of brown algae has a leaf-like photosynthetic part, a stalk-like structure and a holdfast.

Example:- Sargassum, Laminaria, Fucus and Dictyota

️‍️

$\huge \tt \red{Rhodophyceae}$

Rhodophyceae is a class of red algae. They contain a water-soluble red colour pigment called phycoerythrin, which gives them a characteristic red colour. They also contain phycocyanin, chlorophyll a and d. Red algae are mostly marine organisms. They are multicellular thalli. There are unicellular forms as well. The main storage food of red algae is Floridian starch.

Example:- Ceramium, Polysiphonia, Gelidium, Cryptonemia and Gigartina are several species of red algae.