Powdery mildew of crops are caused by
bacteria
Ascomycetes
Basidiomycetes
Phycomycetes
B.
Ascomycetes
Mildew diseases are caused by a group of fungal parasites called Ascomycetes. It is of two types powdery mildew and downy mildew.
Powdery mildews are caused by external parasites which grow superficially on the leaves, green stems and fruits and form powdery or dusty patches which are filled with white conidia. Downy mildews are caused by internal obligate parasites which are characterised by downy growth.
In Whittaker's system of classification, prokaryotes belong to the kingdom
Monera
Protista
Animalia
Fungi
The oldest fossil belongs to which of the following group of plants/ animals?
Asteriodae
Rhodophyceae
Blue- green algae
Phaeophyceae
In which kingdom, would you classify the archaea and nitrogen-fixing organisms. If the five-kingdom system of classification is used?
Protista
Monera
Plantae
Fungi
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
Which of the following is important source of edible protein?
Spirogyra
Porphyra
spirulina
Cephaleuros
In Amoeba hyaline cap is formed by
around the food vacuole
around the contractile vacuole
around the nucleus
on pseudopodia
