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A Handbook of Biology

RËPRØDÜÇTÏØÑ

Vegetative

reproduction:

By

fragmentation.

Asexual

reproduction:

By

pear-

shaped biflagellate zoospores (have

2 unequal laterally attached flagella).

Sexual

reproduction:

Isogamous,

anisogamous or oogamous. Union

of gametes occurs in water or within

the oogonium (oogamous species).

Gametes are pear- shaped (pyriform)

bearing 2 laterally attached flagella.

RHØDØPHÝÇËÅË (RËD ÅLGÅË)



They have the red pigment, r-phycoerythrin



Found in marine water and in warmer areas.



The red thalli of most of the red algae are multicellular.



Some of them have complex body organisation.



The food is stored as floridean starch which is very similar to

amylopectin and glycogen in structure.

E.g. Polysiphonia, Porphyra, Gracilaria and Gelidium

RËPRØDÜÇTÏØÑ

Vegetative

reproduction:

By

fragmentation.

Asexual reproduction: By non-motile

spores.

Sexual reproduction: Oogamous. By

non-motile gametes. It has complex

post fertilisation developments.