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411.

Most inhibitory effects of high auxin concentration are due to formation of excessive amount of:

A.	CO2	B.	Ethylene
C.	Methane	D.	HCN

412.

Most serious disease of pea is:

A.	Early blight	B.	Powdery mildew
C.	Late blight	D.	Anthracnose

413.

Motile zoospores are the chief characters of the subdivision:

A.	Zygomycotina	B.	Basidiomycotina
C.	Mastigomycotina	D.	Deuteromycotina

414.

Movements of a plant organ in response to directional fluxes or gradients in environmental stimuli are called:

A.	Nastic movement	B.	Epinasty
C.	Mutation	D.	Tropism

415.

Movements whose direction is determined by the morphology of the plant are called:

A.	Hastic movement	B.	Hyponasty
C.	Epinasty	D.	Mutation

416.

Flooding of soil grown plant show:

A.	Enhancement of phosphorous in shoots	B.	Promotes ion accumulation by shoots
C.	Depression in N & K in shoots	D.	All of the above

417.

MPP (Marginal Physical Product) of a variable input is negative in:

A.	I stage	B.	II stage
C.	III stage	D.	II & III stage

418.

Which of the following is more suitable for control of Phalaris minor in wheat field?

A.	Sulpho-sulphuran	B.	Pendimethalin
C.	Isoproturon	D.	Methabenzthiazuron

419.

Mulberry silkworm is:

A.	Bombyx mori	B.	Philosamia ricini
C.	Antheraea spp	D.	None of above

420.

Mulching is an importnt agricultural practice. One of the chief aim of this practice is to:

A.	Decrease the evaporation of moisture from the soil	B.	Prevent insect pests from attacking plants
C.	Provide support for the plant	D.	Encourage the plant to grow taller