The ‘blue baby syndrome’ is caused due to pollution by:

A. Chlorides
B. Cyanides
C. Fluorides
D. Nitrates

Escherichia coli is used as an indicator organism to determine pollution of water with:

A. Heavy metals
B. Faecal matter
C. Industrial effluents
D. Pollen of aquatic plants

The stages in the development of a tree are:

A. Seedling
B. Sapling
C. Pole
D. Tree stages

Himalayan foothills and the Potwar region including ______ are covered with the scrub forests which have been reduced to scanty growth at most of the places:

A. Salt Range
B. Kala Chitta Range
C. Both (a) & (b)
D. None of these

Plumeria obtuse, Linn is:

A. A small deciduous tree with thick branches and copious milky juice
B. Leaves spirally arranged
C. 6-12 inches long
D. All of the above

The injuries are generally caused by:

A. Unnecessary haste
B. Use of improper tools
C. Pruning during the growing season when the bark is loose
D. All of the above

Carbon monoxide is a poisonous gas, 1% of which in the air can kill a person in:

A. No time
B. In ten minutes
C. In five minutes
D. In fifteen minutes

The symbiotic association in which one partner gains benefit without benefiting or harming the other is known as:

A. Commensalism
B. Lichen
C. Mutualism
D. None of these

Which of the following is most poisonous?

A. CO
B. CO2
C. C
D. SO2

Rose (Rosa indica) is:

A. Rose is the most popular and most enchanting flower not only for its look or fragrance
B. Its various medicinal and commercial uses
C. Both (a) & (b)
D. None of these