42 Biflagellate zoospores that are pear-shaped and have two unequaliterally attached flagella are found
1) Chlorophyceae
3) Phaeophyceae
2) Rhodophyceae
4) Cyanophyceae
this is because of the survival of them
Answers
Answer:
option. b. phaeophyceae
Phaeophyceae (Brown algae)
Explanation:
Biflagellate zoospores are the pear-shaped structure with two unequal laterally attached flagella. It helps in asexual reproduction in brown algae.
Brown algae are a group of algae belonging to class Phaeophyceae. They are named due to their colour, which varies from brown to olive green. They are mostly found in marine environments. There are around 1500 species of brown algae, which vary greatly in their size and shape. They are multicellular and the colour depends on the ratio of chlorophyll and the pigment, fucoxanthin. They contain seaweeds, some of the notable examples are Ectocarpus, Fucus, giant kelps, Sargassum, etc.
Reproduction- They reproduce by both asexual and sexual means.
Vegetative reproduction is by fragmentation.
Asexual reproduction is by the formation of motile zoospores. They are pear-shaped and have two unequal flagella.
Sexual reproduction is by the formation of motile gametes, which are also biflagellate with two laterally attached flagella.
Sexual reproduction may be oogamous, isogamous or anisogamous.
Gametes unite in water or within oogonium.
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