Question

1. What is a bacteriophage ?
(a) A bacterium which breaks
petroleum
(b) A bacterium which infects
animals.
(c) A virus which lyses
bacteria
(d) A protozoan which feeds
on bacteria
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.
2.
Control of marine pollution
(due to oil) is by
(a) E.coli
(b) Pseudomonas aeruginosa
(c) Corynebacteria
(d) Bacillus clauvelli
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
3.
7.
Red rot and Ergot diseases are
associated with the production
of
(a) Bajra and Wheat
(b) Groundnut and Sugarcane
(c) Wheat and Groundnut
(d) Sugarcane and Bajra
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:

1.c a virus which lyses bacteria

Answer 2

Answer:

Explanation:

Answer:

the answer is

Explanation:

1.(c)

5.(a)

2.Reduce Ocean Pollution

1- Use a reusable bottle.

2 – Refuse disposable utensils : Straws, cutlery, tumblers and plastic bags…

3 – Recycle Properly.

4 – Picking up trash on the beach.

5 – Reduce energy use.

6 – Use less fertilizer.

7 – Avoid Products Containing Microbeads.

8 – Buy ocean-friendly products