NTA Abhyas NEET2020BotanyBiological ClassificationPractice
Gonyaulax is a protist which
Options
- Acauses an algal bloom where its rapid multiplication changes the sea colour
- Bleads to the formation of diatomaceous earth
- Cbehaves like a heterotroph in the absence of sunlight
- Dhas an infectious spore-like stage in their life cycle and has a staggering effect on the human population.
Correct answer
A. causes an algal bloom where its rapid multiplication changes the sea colour
Step-by-step solution
Red tide is caused due to dinoflagellate Gonyaulax. During favourable season Gonyaulax multiplies rapidly forming huge mass which gives red colour to water known as red tide. It secretes toxic substance called saxitoxin in water which results death of large number of marine fishes.