Set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

Azolla is

a) Aquatic bacteria

b) Aquatic Fern

c) Aquatic algae

d) None of the above

Question : 2

Blue-green algae are chiefly used as biofertilizer in the crop of

a) Paddy

b) Wheat

c) Gram

d) Mustard

Question : 3

Aquatic Fern, which is used as a biofertilizer is

a) Marsilia

b) Salvinia

c) Azolla

d) Pteridium

Question : 4

Azolla is often used as biofertilizer because it is associated with

a) Fungus

b) Blue-green algae

c) Red algae

d) Moss

Question : 5

Which bacteria is responsible for nitrogen fixation in soyabean?

a) Rhizobium fajioleai

b) Rhizobium leguminosarum

c) Rhizobium japonicum

d) Rhizobium traitolai

Question : 6

Which one of the following is not correctly matched? Nitrogen fixing Crop agent

a) Azotobacter - Wheat

b) Blue-green algae - Paddy

c) Rhizobium - Pea Leguminisarum

d) Azolla – Maize