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.
Blackman's law of limiting factor is applied to
respiration
transpiration
photorespiration
photosynthesis
The usage of binomial names, for plant species was accepted by all after the publication of the work by
Hooker
Linnaeus
Bentham
Darwin
A prokaryotic cell lacks
true nucleus
nuclear membrane
membrane bound organelles
All of the above
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