Question

5
.
A Bacterial cell divides once
every minute. It takes an hour to
fill a cup. How many minutes
will it takes to fill half the cup ?
(a) 59
(b) 49
(c) 30
(d) 29
6.
Which of the following is not
used as Biofertilizers ?
(a) Legume-Rhizobium
Symbiosis
(b) Azolla-Anabaena
Symbiosis
(c) Algae-fungi symbiosis
(d) Roots of higher plants-
fungi symbiosis
7.
Exclusion of plant disease by
legislation is known as
(a) Disease resistance
(b) Biological control of plant
(c) Plant Quarantine
(d) Cultural Control​

Answer 1

Answer:

6. azolla-anabena symbiosis

7. plant quarantine