The following practices can contribute towards the conservation of natural resources except
afforestation
deforestation
contour ploughing
establishment of Game Reserves
Correct answer is B
No explanation has been provided for this answer.
Which of the following orders correctly represents the trend in eutrophication?
Lack of oxygen → Death of aquatic organisms → Massive algal growth
Excess nitrates and phosphates → Massive algal growth → Lack of oxygen → Death of aquatic organisms
Heavy mineralization → Lack of oxygen → Massive algal growth
Excess nitrates and phosphates → Lack of oxygen → Massive algal growth → Death of aquatic organisms
Correct answer is B
No explanation has been provided for this answer.
protection of wildlife
prevention of habitat destruction
biological control of pests
disposal of raw sewage into the sea
Correct answer is D
No explanation has been provided for this answer.
Air pollution can be reduced by the following methods except?
building tall factory chimneys
passing waste gases through filters and absorbers
using lead-free petrol in car
recycling tins, cans, and bottles
Correct answer is A
Chimneys of factories release toxic gases into the air
Which of these diseases cannot be spread by an insect?
Cholera
Malaria
Trypanosomiasis
Measles
Correct answer is D
No explanation has been provided for this answer.