Multiple Choice QuestionsRed tide of sea is due to presence of
Gonyaulax
Cymbella
chlamydae
blue-green algae
A.
Gonyaulax
Red tide of sea occurs due to the rapid proliferation of dinoflagellates like Gonyaulax, Gymnodinium. Red tides are events in which estuarine, marine or freshwater algae accumulate rapidly in the water column, resulting in colouration of the surface water. It is usually found in coastal areas.
Consider the following statements about basis of classification.
I. Amphibians are classified on the basis of their habitat.
II. Reptiles are classified on the basis of the nature of their skulls.
III. Birds are classified on the basis of their bones.
IV. Mammals are classified on the basis of their mode of reproduction.
Choose the correct option
Only I
I and II
Only II
II and IV
In biosystematics, the basis of classification is
major morphological characters
cytological characters
evolutionary history considering various parameters from different fields of studies
phenotypic relationships between species
The protein that reproduce within the living cells are termed as
plasmids
phages
prions
prophages
The oldest fossil belongs to which of the following group of plants/ animals?
Asteriodae
Rhodophyceae
Blue- green algae
Phaeophyceae
In Amoeba hyaline cap is formed by
around the food vacuole
around the contractile vacuole
around the nucleus
on pseudopodia
The chief advantage of encystment of an Amoeba is
protection from parasites and predators
the chance to get rid of accumulated waste products
the ability to survive during adverse physical conditions
the ability to live for sometime without ingesting food
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